Monitored source OJ 287

Monitored source OJ 287 - blazar

Position: 08:54:48.88 +20:06:30.6 · cameras: TTUQ1b1x1 TTUQ2b1x1 · 97 detections, 2 upper limits · 36 excluded from the lightcurve

Date range: 2025-12-23.52376 .. 2026-05-31.17151 (UTC) · JD 2461033.02376 .. 2461191.67151

Lightcurve - last 30 days

Lightcurve - full time range

Data files: lightcurve.dat (JD mag err camera field) · upperlimits.dat (JD limit_mag camera field) · lightcurve_aavso.txt (AAVSO Extended Format incl. fainter-than records)

Why these photometric measurements are not very precise

Photometric measurements obtained with a wide-field camera are not very precise, for a number of reasons:

Bad plate solution: errors in the astrometric calibration result in misplacement of the photometric aperture. This may create outlier measurements.
Undersampled PSF: star images occupy only a few pixels, so any uncorrected pixel-to-pixel and intra-pixel sensitivity variations affect the measurements more than they would for well-sampled telescopic images in which each star is spread across many pixels.
Low observing altitude: the fields are often imaged only 15-20 degrees above the horizon. This is a deliberate trade-off for an all-sky transient search, as the sky area at low elevation is far larger than the area near the zenith, but it is bad for photometric accuracy. An airmass-dependent magnitude zero-point correction is applied, but it is not perfect.
Color-dependent (second-order) extinction: a star's brightness measured relative to the comparison stars in the field is elevation-dependent if the star's color differs from the average color of the comparison stars.
Blending with nearby stars in crowded fields affects the measurements differently depending on the aperture size, which is adjusted for each image individually based on the seeing and focus quality.
Position-dependent PSF: the same star may fall closer to the image center in one field and farther from it in another, so a different fraction of its PSF is covered by the aperture even when the same aperture is used to measure both images. Field-to-field and camera-to-camera calibration is therefore an issue, and its magnitude differs from source to source.
Chromatic aberration: many wide-field lenses suffer from it, leaving extremely red stars out of focus while the focus is optimal for average-colored stars.
Clouds, if present, dramatically degrade the quality of the photometry across the entire image.

In practice, expect a photometric uncertainty of ~0.1 mag, or somewhat better in favorable conditions.

The intended use of these data is a quick check of the current state of a source (flaring or quiescent) - not precise photometry.

The photometric measurements are performed without a filter; the zero-point of the instrumental magnitude scale is set by the V magnitudes of the field stars. You are welcome to use these data in any way you see fit, providing a link to this page as the origin of the data.

Photometry table (newest measurements first)

Date (UTC) JD(UTC) mag err status camera image 2026-05-31.17151 2461191.67151326 14.3519 0.3416 detection TTUQ2b1x1 wcs_fd_Cnc-03-Q2b1x1_2026-05-30_23-06-48_20.00sec_5.00C_LIGHT_0033.fits 2026-05-28.16980 2461188.66980295 14.5126 99.0000 upperlimit TTUQ2b1x1 wcs_fd_Cnc-03-Q2b1x1_2026-05-27_23-04-20_20.00sec_5.00C_LIGHT_0037.fits 2026-05-25.14402 2461185.64402429 14.6227 0.2853 detection TTUQ2b1x1 wcs_fd_Cnc-03-Q2b1x1_2026-05-24_22-27-13_20.00sec_4.90C_LIGHT_0063.fits 2026-05-25.14303 2461185.64303030 14.7217 0.2673 detection TTUQ1b1x1 wcs_fd_Cnc-03-Q1b1x1_2026-05-24_22-25-47_20.00sec_0.00C_LIGHTs_0063.fits 2026-05-25.14259 2461185.64259073 14.7829 0.2887 detection TTUQ1b1x1 wcs_fd_Cnc-03-Q1b1x1_2026-05-24_22-25-09_20.00sec_-0.00C_LIGHTs_0062.fits 2026-05-20.16138 2461180.66138241 14.7465 0.1968 detection TTUQ2b1x1 wcs_fd_Cnc-03-Q2b1x1_2026-05-19_22-52-13_20.00sec_5.00C_LIGHT_0092.fits 2026-05-19.16769 2461179.66768810 14.5772 0.1555 detection TTUQ2b1x1 wcs_fd_Cnc-03-Q2b1x1_2026-05-18_23-01-18_20.00sec_4.90C_LIGHT_0059.fits 2026-05-19.16723 2461179.66722808 14.5814 0.1567 detection TTUQ2b1x1 wcs_fd_Cnc-03-Q2b1x1_2026-05-18_23-00-38_20.00sec_4.90C_LIGHT_0058.fits 2026-05-19.14824 2461179.64823546 14.6367 0.1516 detection TTUQ1b1x1 wcs_fd_Cnc-03-Q1b1x1_2026-05-18_22-33-17_20.00sec_-0.00C_LIGHTs_0065.fits 2026-05-19.14781 2461179.64780550 14.5009 0.1316 detection TTUQ1b1x1 wcs_fd_Cnc-03-Q1b1x1_2026-05-18_22-32-40_20.00sec_-0.00C_LIGHTs_0064.fits 2026-05-18.15297 2461178.65297262 14.7689 0.1757 detection TTUQ1b1x1 wcs_fd_Cnc-03-Q1b1x1_2026-05-17_22-40-06_20.00sec_-0.00C_LIGHTs_0578.fits 2026-05-18.15230 2461178.65230315 14.5155 0.1384 detection TTUQ1b1x1 wcs_fd_Cnc-03-Q1b1x1_2026-05-17_22-39-08_20.00sec_-0.00C_LIGHTs_0577.fits 2026-05-18.15125 2461178.65125187 15.2479 0.2647 detection TTUQ2b1x1 wcs_fd_Cnc-03-Q2b1x1_2026-05-17_22-37-38_20.00sec_4.90C_LIGHT_1427.fits 2026-05-18.15069 2461178.65069488 14.7744 0.1674 detection TTUQ2b1x1 wcs_fd_Cnc-03-Q2b1x1_2026-05-17_22-36-50_20.00sec_4.90C_LIGHT_1426.fits 2026-05-13.18209 2461173.68208900 15.1415 0.2513 detection TTUQ1b1x1 wcs_fd_Cnc-03-Q1b1x1_2026-05-12_23-22-02_20.00sec_-0.00C_LIGHTs_0072.fits 2026-05-13.18163 2461173.68163236 14.5376 0.1459 detection TTUQ1b1x1 wcs_fd_Cnc-03-Q1b1x1_2026-05-12_23-21-23_20.00sec_-0.00C_LIGHTs_0071.fits 2026-05-13.17021 2461173.67021186 14.6725 0.1805 detection TTUQ2b1x1 wcs_fd_Cnc-03-Q2b1x1_2026-05-12_23-04-56_20.00sec_-0.00C_LIGHT_0066.fits 2026-05-13.16949 2461173.66948770 14.9695 0.2220 detection TTUQ2b1x1 wcs_fd_Cnc-03-Q2b1x1_2026-05-12_23-03-53_20.00sec_-0.00C_LIGHT_0065.fits 2026-05-12.17560 2461172.67559630 14.8543 0.2001 detection TTUQ1b1x1 wcs_fd_Cnc-03-Q1b1x1_2026-05-11_23-12-41_20.00sec_-4.90C_LIGHTs_0067.fits 2026-05-12.17495 2461172.67494500 15.1056 0.2551 detection TTUQ1b1x1 wcs_fd_Cnc-03-Q1b1x1_2026-05-11_23-11-45_20.00sec_-4.90C_LIGHTs_0066.fits 2026-05-12.17297 2461172.67297142 14.8609 0.1952 detection TTUQ2b1x1 wcs_fd_Cnc-03-Q2b1x1_2026-05-11_23-08-54_20.00sec_-4.90C_LIGHT_0068.fits 2026-05-12.17244 2461172.67243505 14.5325 0.1426 detection TTUQ2b1x1 wcs_fd_Cnc-03-Q2b1x1_2026-05-11_23-08-08_20.00sec_-5.00C_LIGHT_0067.fits 2026-05-11.17529 2461171.67528626 14.8726 0.1883 detection TTUQ1b1x1 wcs_fd_Cnc-03-Q1b1x1_2026-05-10_23-12-14_20.00sec_-5.00C_LIGHTs_0093.fits 2026-05-11.17450 2461171.67449744 14.6969 0.1597 detection TTUQ1b1x1 wcs_fd_Cnc-03-Q1b1x1_2026-05-10_23-11-06_20.00sec_-4.90C_LIGHTs_0092.fits 2026-05-11.16345 2461171.66345176 14.6491 0.1519 detection TTUQ2b1x1 wcs_fd_Cnc-03-Q2b1x1_2026-05-10_22-55-12_20.00sec_-4.90C_LIGHT_0110.fits 2026-05-11.16300 2461171.66300086 14.5235 0.1362 detection TTUQ2b1x1 wcs_fd_Cnc-03-Q2b1x1_2026-05-10_22-54-33_20.00sec_-4.90C_LIGHT_0109.fits 2026-05-09.19136 2461169.69136153 14.8586 0.1969 detection TTUQ1b1x1 wcs_fd_Cnc-03-Q1b1x1_2026-05-08_23-35-23_20.00sec_-4.90C_LIGHTs_0092.fits 2026-05-09.19056 2461169.69055812 14.8169 0.1869 detection TTUQ1b1x1 wcs_fd_Cnc-03-Q1b1x1_2026-05-08_23-34-14_20.00sec_-4.90C_LIGHTs_0091.fits 2026-05-09.18121 2461169.68120660 14.7075 0.1753 detection TTUQ2b1x1 wcs_fd_Cnc-03-Q2b1x1_2026-05-08_23-20-46_20.00sec_-4.90C_LIGHT_0079.fits 2026-05-09.18067 2461169.68067478 14.7447 0.1785 detection TTUQ2b1x1 wcs_fd_Cnc-03-Q2b1x1_2026-05-08_23-20-00_20.00sec_-4.90C_LIGHT_0078.fits 2026-05-08.18920 2461168.68920338 14.8410 0.1686 detection TTUQ1b1x1 wcs_fd_Cnc-03-Q1b1x1_2026-05-07_23-32-17_20.00sec_-5.00C_LIGHTs_0204.fits 2026-05-08.18842 2461168.68841550 14.5988 0.1343 detection TTUQ1b1x1 wcs_fd_Cnc-03-Q1b1x1_2026-05-07_23-31-09_20.00sec_-4.90C_LIGHTs_0203.fits 2026-05-08.17383 2461168.67383287 14.6836 0.1515 detection TTUQ2b1x1 wcs_fd_Cnc-03-Q2b1x1_2026-05-07_23-10-09_20.00sec_-4.90C_LIGHT_0101.fits 2026-05-08.17315 2461168.67314955 14.6854 0.1502 detection TTUQ2b1x1 wcs_fd_Cnc-03-Q2b1x1_2026-05-07_23-09-10_20.00sec_-4.90C_LIGHT_0100.fits 2026-05-07.19269 2461167.69268669 14.8391 0.2072 detection TTUQ2b1x1 wcs_fd_Cnc-03-Q2b1x1_2026-05-06_23-37-18_20.00sec_-4.90C_LIGHT_0066.fits 2026-05-07.19190 2461167.69190208 14.5575 0.1548 detection TTUQ2b1x1 wcs_fd_Cnc-03-Q2b1x1_2026-05-06_23-36-10_20.00sec_-5.00C_LIGHT_0065.fits 2026-05-07.18106 2461167.68106020 14.6055 0.1583 detection TTUQ1b1x1 wcs_fd_Cnc-03-Q1b1x1_2026-05-06_23-20-33_20.00sec_-4.90C_LIGHTs_0033.fits 2026-05-07.18027 2461167.68026838 14.6129 0.1596 detection TTUQ1b1x1 wcs_fd_Cnc-03-Q1b1x1_2026-05-06_23-19-25_20.00sec_-4.90C_LIGHTs_0032.fits 2026-05-03.18954 2461163.68953751 15.0512 99.0000 upperlimit TTUQ2b1x1 wcs_fd_Cnc-03-Q2b1x1_2026-05-02_23-32-46_20.00sec_-4.90C_LIGHT_0107.fits 2026-04-28.18682 2461158.68682461 14.6656 0.2816 detection TTUQ2b1x1 wcs_fd_Cnc-03-Q2b1x1_2026-04-27_23-28-51_20.00sec_-4.90C_LIGHT_0110.fits 2026-04-19.20827 2461149.70827101 14.6716 0.1310 detection TTUQ1b1x1 wcs_fd_Cnc-03-Q1b1x1_2026-04-18_23-59-44_20.00sec_-5.00C_LIGHTs_0362.fits 2026-04-19.20748 2461149.70748330 14.7302 0.1400 detection TTUQ1b1x1 wcs_fd_Cnc-03-Q1b1x1_2026-04-18_23-58-36_20.00sec_-4.90C_LIGHTs_0361.fits 2026-04-19.20198 2461149.70198437 14.4726 0.1130 detection TTUQ2b1x1 wcs_fd_Cnc-03-Q2b1x1_2026-04-18_23-50-41_20.00sec_-4.90C_LIGHT_0466.fits 2026-04-19.20143 2461149.70142694 14.6105 0.1275 detection TTUQ2b1x1 wcs_fd_Cnc-03-Q2b1x1_2026-04-18_23-49-53_20.00sec_-5.00C_LIGHT_0465.fits 2026-04-17.22990 2461147.72990402 14.7297 0.1555 detection TTUQ1b1x1 wcs_fd_Cnc-03-Q1b1x1_2026-04-17_00-30-53_20.00sec_-4.90C_LIGHTs_0122.fits 2026-04-17.22915 2461147.72914833 14.7076 0.1479 detection TTUQ1b1x1 wcs_fd_Cnc-03-Q1b1x1_2026-04-17_00-29-48_20.00sec_-4.90C_LIGHTs_0121.fits 2026-04-17.20811 2461147.70811325 14.3535 0.1078 detection TTUQ2b1x1 wcs_fd_Cnc-03-Q2b1x1_2026-04-16_23-59-30_20.00sec_-5.00C_LIGHT_0132.fits 2026-04-17.20746 2461147.70746456 14.6958 0.1461 detection TTUQ2b1x1 wcs_fd_Cnc-03-Q2b1x1_2026-04-16_23-58-34_20.00sec_-4.90C_LIGHT_0131.fits 2026-04-16.20234 2461146.70233806 14.7490 0.1268 detection TTUQ1b1x1 wcs_fd_Cnc-03-Q1b1x1_2026-04-15_23-51-12_20.00sec_-4.90C_LIGHTs_0127.fits 2026-04-16.20166 2461146.70166277 14.6567 0.1189 detection TTUQ1b1x1 wcs_fd_Cnc-03-Q1b1x1_2026-04-15_23-50-13_20.00sec_-4.90C_LIGHTs_0126.fits 2026-04-16.19817 2461146.69817459 15.0976 0.2003 detection TTUQ2b1x1 wcs_fd_Cnc-03-Q2b1x1_2026-04-15_23-45-12_20.00sec_-5.00C_LIGHT_0149.fits 2026-04-16.19764 2461146.69763654 14.7727 0.1524 detection TTUQ2b1x1 wcs_fd_Cnc-03-Q2b1x1_2026-04-15_23-44-25_20.00sec_-5.00C_LIGHT_0148.fits 2026-04-14.18208 2461144.68208301 14.9295 0.1560 detection TTUQ1b1x1 wcs_fd_Cnc-03-Q1b1x1_2026-04-13_23-22-01_20.00sec_-4.90C_LIGHTs_0115.fits 2026-04-13.27091 2461143.77090571 14.5775 0.1621 detection TTUQ1b1x1 wcs_fd_Cnc-03-Q1b1x1_2026-04-13_01-29-56_20.00sec_-4.90C_LIGHTs_0077.fits 2026-04-13.27008 2461143.77008250 14.8112 0.1960 detection TTUQ1b1x1 wcs_fd_Cnc-03-Q1b1x1_2026-04-13_01-28-45_20.00sec_-4.90C_LIGHTs_0076.fits 2026-04-13.26595 2461143.76595416 14.6842 0.1703 detection TTUQ2b1x1 wcs_fd_Cnc-03-Q2b1x1_2026-04-13_01-22-48_20.00sec_-5.00C_LIGHT_0414.fits 2026-04-13.26535 2461143.76534956 14.7016 0.1764 detection TTUQ2b1x1 wcs_fd_Cnc-03-Q2b1x1_2026-04-13_01-21-56_20.00sec_-5.00C_LIGHT_0413.fits 2026-04-10.27805 2461140.77804986 15.0040 0.1903 detection TTUQ1b1x1 wcs_fd_Cnc-03-Q1b1x1_2026-04-10_01-40-13_20.00sec_-5.00C_LIGHTs_0139.fits 2026-04-10.27714 2461140.77713715 15.0854 0.2045 detection TTUQ1b1x1 wcs_fd_Cnc-03-Q1b1x1_2026-04-10_01-38-54_20.00sec_-4.90C_LIGHTs_0138.fits 2026-04-10.23371 2461140.73371325 14.7346 0.1458 detection TTUQ2b1x1 wcs_fd_Cnc-03-Q2b1x1_2026-04-10_00-36-22_20.00sec_-4.90C_LIGHT_0113.fits 2026-04-10.23311 2461140.73311441 14.6286 0.1293 detection TTUQ2b1x1 wcs_fd_Cnc-03-Q2b1x1_2026-04-10_00-35-31_20.00sec_-4.90C_LIGHT_0112.fits 2026-04-09.23632 2461139.73631865 14.8935 0.1610 detection TTUQ1b1x1 wcs_fd_Cnc-03-Q1b1x1_2026-04-09_00-40-07_20.00sec_-4.90C_LIGHTs_0134.fits 2026-04-09.23546 2461139.73546226 14.8501 0.1560 detection TTUQ1b1x1 wcs_fd_Cnc-03-Q1b1x1_2026-04-09_00-38-53_20.00sec_-5.00C_LIGHTs_0133.fits 2026-04-09.20423 2461139.70423171 14.5669 0.1242 detection TTUQ2b1x1 wcs_fd_Cnc-03-Q2b1x1_2026-04-08_23-53-55_20.00sec_-4.90C_LIGHT_0163.fits 2026-04-09.20371 2461139.70370963 14.4797 0.1116 detection TTUQ2b1x1 wcs_fd_Cnc-03-Q2b1x1_2026-04-08_23-53-10_20.00sec_-5.00C_LIGHT_0162.fits 2026-04-08.28833 2461138.78833013 15.0576 0.2117 detection TTUQ1b1x1 wcs_fd_Cnc-03-Q1b1x1_2026-04-08_01-55-01_20.00sec_-4.90C_LIGHTs_0080.fits 2026-04-08.28757 2461138.78757472 14.8780 0.1823 detection TTUQ1b1x1 wcs_fd_Cnc-03-Q1b1x1_2026-04-08_01-53-56_20.00sec_-4.90C_LIGHTs_0079.fits 2026-04-08.26977 2461138.76977163 15.0964 0.2224 detection TTUQ2b1x1 wcs_fd_Cnc-03-Q2b1x1_2026-04-08_01-28-18_20.00sec_-5.00C_LIGHT_0086.fits 2026-04-08.26916 2461138.76916272 14.7363 0.1653 detection TTUQ2b1x1 wcs_fd_Cnc-03-Q2b1x1_2026-04-08_01-27-25_20.00sec_-4.90C_LIGHT_0085.fits 2026-04-06.20067 2461136.70066921 14.6511 0.1213 detection TTUQ2b1x1 wcs_fd_Cnc-03-Q2b1x1_2026-04-05_23-48-47_20.00sec_-4.90C_LIGHT_0147.fits 2026-04-06.20000 2461136.69999850 14.8201 0.1466 detection TTUQ2b1x1 wcs_fd_Cnc-03-Q2b1x1_2026-04-05_23-47-49_20.00sec_-4.90C_LIGHT_0146.fits 2026-03-26.15664 2461125.65663616 15.2465 0.2926 detection TTUQ2b1x1 wcs_fd_Cnc-03-Q2b1x1_2026-03-25_22-45-23_20.00sec_-10.00C_LIGHT_0355.fits 2026-03-26.15608 2461125.65607581 15.1435 0.2791 detection TTUQ2b1x1 wcs_fd_Cnc-03-Q2b1x1_2026-03-25_22-44-34_20.00sec_-10.00C_LIGHT_0354.fits 2026-03-25.26297 2461124.76297448 15.0342 0.2985 detection TTUQ2b1x1 wcs_fd_Cnc-03-Q2b1x1_2026-03-25_01-18-30_20.00sec_-15.00C_LIGHT_0043.fits 2026-03-25.26240 2461124.76239994 15.0324 0.2976 detection TTUQ2b1x1 wcs_fd_Cnc-03-Q2b1x1_2026-03-25_01-17-41_20.00sec_-14.90C_LIGHT_0042.fits 2026-03-22.27326 2461121.77326444 15.1795 0.1773 detection TTUQ1b1x1 wcs_fd_Cnc-03-Q1b1x1_2026-03-22_01-33-20_20.00sec_-15.00C_LIGHT_0122.fits 2026-03-22.27262 2461121.77261594 15.2849 0.1784 detection TTUQ1b1x1 wcs_fd_Cnc-03-Q1b1x1_2026-03-22_01-32-24_20.00sec_-15.00C_LIGHT_0121.fits 2026-03-22.24999 2461121.74999416 14.9795 0.1484 detection TTUQ2b1x1 wcs_fd_Cnc-03-Q2b1x1_2026-03-22_00-59-49_20.00sec_-14.90C_LIGHT_0121.fits 2026-03-22.24949 2461121.74948867 15.1066 0.1641 detection TTUQ2b1x1 wcs_fd_Cnc-03-Q2b1x1_2026-03-22_00-59-05_20.00sec_-14.90C_LIGHT_0120.fits 2026-03-21.20542 2461120.70542122 15.1330 0.1741 detection TTUQ2b1x1 wcs_fd_Cnc-03-Q2b1x1_2026-03-20_23-55-38_20.00sec_-14.90C_LIGHT_0188.fits 2026-03-21.20488 2461120.70487925 15.2468 0.1952 detection TTUQ2b1x1 wcs_fd_Cnc-03-Q2b1x1_2026-03-20_23-54-51_20.00sec_-14.90C_LIGHT_0187.fits 2026-03-20.17704 2461119.67704186 15.0731 0.1642 detection TTUQ2b1x1 wcs_fd_Cnc-03-Q2b1x1_2026-03-19_23-14-46_20.00sec_-15.00C_LIGHT_0145.fits 2026-03-20.17642 2461119.67641736 14.9372 0.1501 detection TTUQ2b1x1 wcs_fd_Cnc-03-Q2b1x1_2026-03-19_23-13-52_20.00sec_-14.90C_LIGHT_0144.fits 2026-03-19.33567 2461118.83566514 15.3681 0.2893 detection TTUQ2b1x1 wcs_fd_Cnc-03-Q2b1x1_2026-03-19_03-03-11_20.00sec_-15.00C_LIGHT_0065.fits 2026-03-19.33514 2461118.83514018 15.2046 0.2447 detection TTUQ2b1x1 wcs_fd_Cnc-03-Q2b1x1_2026-03-19_03-02-26_20.00sec_-14.90C_LIGHT_0064.fits 2026-02-22.25365 2461093.75364639 14.6009 0.0991 detection TTUQ2b1x1 wcs_fd_Cnc-03-Q2b1x1_2026-02-22_00-05-05_20.00sec_-14.90C_LIGHT_0202.fits 2026-02-22.25309 2461093.75309112 14.8517 0.1326 detection TTUQ2b1x1 wcs_fd_Cnc-03-Q2b1x1_2026-02-22_00-04-17_20.00sec_-15.00C_LIGHT_0201.fits 2026-02-22.21768 2461093.71767653 15.0828 0.1634 detection TTUQ1b1x1 wcs_fd_Cnc-03-Q1b1x1_2026-02-21_23-13-17_20.00sec_-15.00C_LIGHT_0200.fits 2026-02-22.21707 2461093.71707330 14.9402 0.1410 detection TTUQ1b1x1 wcs_fd_Cnc-03-Q1b1x1_2026-02-21_23-12-25_20.00sec_-15.00C_LIGHT_0199.fits 2026-02-12.23150 2461083.73149664 14.9309 0.1390 detection TTUQ1b1x1 wcs_fd_Cnc-03-Q1b1x1_2026-02-11_23-33-11_20.00sec_-15.00C_LIGHT_0222.fits 2026-02-12.23095 2461083.73095264 15.0200 0.1478 detection TTUQ1b1x1 wcs_fd_Cnc-03-Q1b1x1_2026-02-11_23-32-24_20.00sec_-14.90C_LIGHT_0221.fits 2026-02-11.26464 2461082.76464312 14.9033 0.1648 detection TTUQ1b1x1 wcs_fd_Cnc-03-Q1b1x1_2026-02-11_00-20-55_20.00sec_-14.90C_LIGHT_0246.fits 2026-02-11.26389 2461082.76389197 15.0180 0.1745 detection TTUQ1b1x1 wcs_fd_Cnc-03-Q1b1x1_2026-02-11_00-19-50_20.00sec_-15.00C_LIGHT_0245.fits 2026-01-18.35468 2461058.85467706 15.2497 0.1783 detection TTUQ1b1x1 wcs_fd_Cnc-03-Q1b1x1_2026-01-18_02-30-34_20.00sec_-15.00C_LIGHT_0379.fits 2026-01-18.35420 2461058.85419721 14.8985 0.1306 detection TTUQ1b1x1 wcs_fd_Cnc-03-Q1b1x1_2026-01-18_02-29-52_20.00sec_-15.00C_LIGHT_0378.fits 2026-01-09.23199 2461049.73198799 15.5645 0.2747 detection TTUQ1b1x1 wcs_fd_Cnc-03-Q1b1x1_2026-01-08_23-33-53_20.00sec_-15.00C_LIGHT_0220.fits 2026-01-09.23151 2461049.73150576 15.1385 0.1852 detection TTUQ1b1x1 wcs_fd_Cnc-03-Q1b1x1_2026-01-08_23-33-12_20.00sec_-14.90C_LIGHT_0219.fits 2025-12-23.52420 2461033.02419578 15.1459 0.1906 detection TTUQ1b1x1 wcs_fd_Cnc-03-Q1b1x1_2025-12-23_06-34-40_20.00sec_-14.90C_LIGHT_0699.fits 2025-12-23.52376 2461033.02376176 15.0923 0.1823 detection TTUQ1b1x1 wcs_fd_Cnc-03-Q1b1x1_2025-12-23_06-34-03_20.00sec_-14.90C_LIGHT_0698.fits

Measurements excluded from the lightcurve

These measurements are excluded from the lightcurve, the plot and the AAVSO file. Reason visit_inconsistent: frames of the same field taken minutes apart disagree by more than the expected measurement scatter - a real star cannot change that fast, so at least one frame of the visit is corrupted (typically by patchy clouds) and there is no way to tell which one. Reason cloudy_frame: the frame failed the cloud check - its field stars disagree with the reference frame in a way uniform transparency loss cannot explain. The remaining reasons mean the measurement could not be made on that image at all, so no magnitude is shown: bad_ccd_region - the position falls on a masked part of the detector (bad_region.lst of that camera); saturated - the star is there but too bright to measure; blank_pixels_in_aperture, magnitude_calibration_failed and measurement_failed - the aperture contained blank pixels, the frame could not be calibrated, or the measuring tool failed. These images WERE taken and WERE measured: they are listed here so that a rejected measurement is never mistaken for a gap in the coverage. The excluded rows are kept in excluded_measurements.dat.

Date (UTC) JD(UTC) mag err reason camera image 2026-09-19.43505 2461302.93505251 15.1144 99.0000 cloudy_frame TTUQ1b1x1 wcs_fd_Cnc-03-Q1b1x1_2026-09-19_05-26-18_20.00sec_-0.00C_LIGHTs_0491.fits 2026-09-19.43434 2461302.93434313 15.0849 99.0000 cloudy_frame TTUQ1b1x1 wcs_fd_Cnc-03-Q1b1x1_2026-09-19_05-25-17_20.00sec_-0.00C_LIGHTs_0490.fits 2026-09-19.43413 2461302.93413196 14.9954 99.0000 cloudy_frame TTUQ2b1x1 wcs_fd_Cnc-03-Q2b1x1_2026-09-19_05-24-59_20.00sec_0.00C_LIGHT_0539.fits 2026-09-19.43329 2461302.93329137 14.9983 99.0000 cloudy_frame TTUQ2b1x1 wcs_fd_Cnc-03-Q2b1x1_2026-09-19_05-23-46_20.00sec_-0.00C_LIGHT_0538.fits 2026-09-18.43807 2461301.93806749 15.0903 99.0000 cloudy_frame TTUQ2b1x1 wcs_fd_Cnc-03-Q2b1x1_2026-09-18_05-30-39_20.00sec_-0.00C_LIGHT_0545.fits 2026-09-18.43750 2461301.93750309 15.0696 99.0000 cloudy_frame TTUQ2b1x1 wcs_fd_Cnc-03-Q2b1x1_2026-09-18_05-29-50_20.00sec_0.00C_LIGHT_0544.fits 2026-09-18.43672 2461301.93671755 15.1116 99.0000 cloudy_frame TTUQ1b1x1 wcs_fd_Cnc-03-Q1b1x1_2026-09-18_05-28-42_20.00sec_-0.00C_LIGHTs_0478.fits 2026-09-18.43607 2461301.93606806 15.1376 99.0000 cloudy_frame TTUQ1b1x1 wcs_fd_Cnc-03-Q1b1x1_2026-09-18_05-27-46_20.00sec_-0.00C_LIGHTs_0477.fits 2026-09-14.45024 2461297.95024443 15.1981 99.0000 cloudy_frame TTUQ2b1x1 wcs_fd_Cnc-03-Q2b1x1_2026-09-14_05-48-11_20.00sec_-0.00C_LIGHT_0571.fits 2026-09-14.44897 2461297.94896733 15.2080 99.0000 cloudy_frame TTUQ1b1x1 wcs_fd_Cnc-03-Q1b1x1_2026-09-14_05-46-20_20.00sec_-0.00C_LIGHTs_0497.fits 2026-09-14.44810 2461297.94810037 15.2147 99.0000 cloudy_frame TTUQ1b1x1 wcs_fd_Cnc-03-Q1b1x1_2026-09-14_05-45-05_20.00sec_-0.00C_LIGHTs_0496.fits 2026-09-14.44791 2461297.94790828 15.1358 99.0000 cloudy_frame TTUQ2b1x1 wcs_fd_Cnc-03-Q2b1x1_2026-09-14_05-44-49_20.00sec_-0.00C_LIGHT_0570.fits 2026-09-09.46160 2461292.96160097 14.8408 99.0000 cloudy_frame TTUQ2b1x1 wcs_fd_Cnc-03-Q2b1x1_2026-09-09_06-04-32_20.00sec_-0.00C_LIGHT_0388.fits 2026-09-09.46140 2461292.96140216 14.9497 99.0000 cloudy_frame TTUQ1b1x1 wcs_fd_Cnc-03-Q1b1x1_2026-09-09_06-04-15_20.00sec_-0.00C_LIGHTs_0373.fits 2026-09-09.46100 2461292.96099912 14.8480 99.0000 cloudy_frame TTUQ2b1x1 wcs_fd_Cnc-03-Q2b1x1_2026-09-09_06-03-40_20.00sec_-0.00C_LIGHT_0387.fits 2026-09-09.46082 2461292.96081825 14.9038 99.0000 cloudy_frame TTUQ1b1x1 wcs_fd_Cnc-03-Q1b1x1_2026-09-09_06-03-24_20.00sec_0.00C_LIGHTs_0372.fits 2026-09-08.46841 2461291.96840595 13.8108 99.0000 cloudy_frame TTUQ2b1x1 wcs_fd_Cnc-03-Q2b1x1_2026-09-08_06-14-20_20.00sec_-0.00C_LIGHT_0459.fits 2026-09-08.46783 2461291.96782892 13.7542 99.0000 cloudy_frame TTUQ2b1x1 wcs_fd_Cnc-03-Q2b1x1_2026-09-08_06-13-30_20.00sec_-0.00C_LIGHT_0458.fits 2026-09-07.46698 2461290.96698095 14.7322 99.0000 cloudy_frame TTUQ1b1x1 wcs_fd_Cnc-03-Q1b1x1_2026-09-07_06-12-17_20.00sec_-0.00C_LIGHTs_0481.fits 2026-09-07.46687 2461290.96687355 14.6836 99.0000 cloudy_frame TTUQ2b1x1 wcs_fd_Cnc-03-Q2b1x1_2026-09-07_06-12-07_20.00sec_-0.00C_LIGHT_0556.fits 2026-09-07.46630 2461290.96630241 14.7592 99.0000 cloudy_frame TTUQ1b1x1 wcs_fd_Cnc-03-Q1b1x1_2026-09-07_06-11-18_20.00sec_0.00C_LIGHTs_0480.fits 2026-09-07.46628 2461290.96627781 14.6929 99.0000 cloudy_frame TTUQ2b1x1 wcs_fd_Cnc-03-Q2b1x1_2026-09-07_06-11-16_20.00sec_-0.00C_LIGHT_0555.fits 2026-09-06.46997 2461289.96996913 14.3366 99.0000 cloudy_frame TTUQ2b1x1 wcs_fd_Cnc-03-Q2b1x1_2026-09-06_06-16-35_20.00sec_-0.00C_LIGHT_0485.fits 2026-09-06.46919 2461289.96918944 14.3903 99.0000 cloudy_frame TTUQ2b1x1 wcs_fd_Cnc-03-Q2b1x1_2026-09-06_06-15-27_20.00sec_0.00C_LIGHT_0484.fits 2026-09-05.47568 2461288.97568086 13.8790 99.0000 cloudy_frame TTUQ1b1x1 wcs_fd_Cnc-03-Q1b1x1_2026-09-05_06-24-48_20.00sec_-0.00C_LIGHTs_0415.fits 2026-09-05.47490 2461288.97490014 13.8826 99.0000 cloudy_frame TTUQ1b1x1 wcs_fd_Cnc-03-Q1b1x1_2026-09-05_06-23-41_20.00sec_-0.00C_LIGHTs_0414.fits 2026-09-05.47332 2461288.97331832 13.7793 99.0000 cloudy_frame TTUQ2b1x1 wcs_fd_Cnc-03-Q2b1x1_2026-09-05_06-21-24_20.00sec_-0.00C_LIGHT_0463.fits 2026-09-05.47257 2461288.97256960 13.8314 99.0000 cloudy_frame TTUQ2b1x1 wcs_fd_Cnc-03-Q2b1x1_2026-09-05_06-20-20_20.00sec_-0.00C_LIGHT_0462.fits 2026-09-03.47891 2461286.97891328 13.3395 99.0000 cloudy_frame TTUQ1b1x1 wcs_fd_Cnc-03-Q1b1x1_2026-09-03_06-29-28_20.00sec_-0.00C_LIGHTs_0504.fits 2026-09-03.47842 2461286.97842377 13.3867 99.0000 cloudy_frame TTUQ1b1x1 wcs_fd_Cnc-03-Q1b1x1_2026-09-03_06-28-45_20.00sec_-0.00C_LIGHTs_0503.fits 2026-09-03.47795 2461286.97794622 13.3629 99.0000 cloudy_frame TTUQ2b1x1 wcs_fd_Cnc-03-Q2b1x1_2026-09-03_06-28-04_20.00sec_-0.00C_LIGHT_0567.fits 2026-09-03.47733 2461286.97732559 13.4825 99.0000 cloudy_frame TTUQ2b1x1 wcs_fd_Cnc-03-Q2b1x1_2026-09-03_06-27-10_20.00sec_-0.00C_LIGHT_0566.fits 2026-06-11.14341 2461202.64340672 14.7531 0.3115 visit_inconsistent TTUQ1b1x1 wcs_fd_Cnc-03-Q1b1x1_2026-06-10_22-26-20_20.00sec_0.00C_LIGHTs_0041.fits 2026-06-11.14291 2461202.64290625 14.9032 99.0000 visit_inconsistent TTUQ1b1x1 wcs_fd_Cnc-03-Q1b1x1_2026-06-10_22-25-37_20.00sec_0.00C_LIGHTs_0040.fits 2026-02-12.48649 2461083.98648707 15.0247 99.0000 visit_inconsistent TTUQ2b1x1 wcs_fd_Cnc-03-Q2b1x1_2026-02-12_05-40-22_20.00sec_-15.00C_LIGHT_0037.fits 2026-02-12.48592 2461083.98592220 14.5366 0.2294 visit_inconsistent TTUQ2b1x1 wcs_fd_Cnc-03-Q2b1x1_2026-02-12_05-39-33_20.00sec_-14.90C_LIGHT_0036.fits