AAVSO: American Association of Variable Star Observers
Login

Variable Star Plotter

Field photometry for MRK 501 from the AAVSO Variable Star Database

Data includes all comparison stars within 0.125° of RA: 16:53:52.22 [253.46758333°] & Dec: 39:45:36.6 [39.76016667°]

Report this sequence as X36049BDK in the chart field of your observation report.

AUID RA Dec Label V B-V Comments
000-BBY-120 16:53:45.83 [253.44096375000004°] 39:44:09.0 [39.73583221°] 126 12.632 (0.012)10 0.933 (0.018)
000-BBY-116 16:53:28.51 [253.36878967°] 39:46:59.0 [39.78305435°] 132 13.224 (0.016)10 0.864 (0.023)
000-BBY-135 16:54:19.46 [253.58108521000003°] 39:43:12.4 [39.72011185°] 142 14.156 (0.025)10 0.539 (0.035)
000-BBY-134 16:54:19.23 [253.5801239°] 39:47:50.6 [39.79738998°] 144 14.446 (0.025)10 0.620 (0.035)
000-BBY-133 16:54:11.64 [253.54849243°] 39:49:10.9 [39.81969452°] 148 14.754 (0.026)10 0.681 (0.037)
000-BBY-117 16:53:31.65 [253.38188170999996°] 39:47:17.4 [39.78816605°] 152 15.179 (0.011)10 0.767 (0.016)
000-BBY-121 16:53:46.83 [253.44512939°] 39:43:08.7 [39.71908569°] 153 15.348 (0.015)10 0.673 (0.021)
000-BBY-126 16:53:58.46 [253.49357604999997°] 39:48:01.3 [39.80036163°] 155 15.493 (0.022)10 0.750 (0.031)
000-BBY-124 16:53:57.06 [253.48774719°] 39:45:35.3 [39.75980759°] 157 15.682 (0.015)10 1.151 (0.027)
  • AUID is the AAVSO Unique Identifier for the star. When reporting a problem, please include this AUID.
  • Coordinates are in J2000 sexagesimal format, followed by decimal degrees
  • Search for variable stars in this field via VSX
  • Label is that star's label when plotted on an AAVSO chart, usually (but not always) its V magnitude rounded to the nearest tenth.

Source Reference Table

Footnote Source Footnote Source Footnote Source
1 Tycho-2 17 ASAS 33 SRO50
2 GSC 1.2 18 SRO 34 K35
3 GSC 2.2 19 NA 35 Landolt2007
4 USNO A2.0 20 GCPD 36 Landolt2009
5 USNO B1.0 21 SDSS 37 BSM_S
6 GCVS 4.2 22 BSC 38 UCAC3
7 UCAC2 23 LONEOS 39 UCAC4
8 2MASS 24 WBVR 40 BSM-Hamren
9 AAVSO Charts 25 DENIS 41 BSM_Berry
10 CCD Henden 26 CMC14 42 TMO61
11 Downes 27 RRLyr 43 VSX
12 Hipparcos 28 BSM_NM 44 COKER30
13 HD 29 APASS 45 BSM_HQ
14 NSV 30 W28 46 Pan-STARRS
15 ACP 0.9 31 W30 47 Landolt2013
16 TASS 32 OC61 48 GAIA DR2