AAVSO: American Association of Variable Star Observers
Login

Variable Star Plotter

Field photometry for MRK 421 from the AAVSO Variable Star Database

Data includes all comparison stars within 0.5° of RA: 11:04:27.32 [166.11383333°] & Dec: 38:12:31.8 [38.20883333°]

Report this sequence as X36328AWG in the chart field of your observation report.

AUID RA Dec Label V B-V Comments
000-BBR-962 11:04:31.23 [166.13011169°] 38:14:28.9 [38.24136353°] 60 6.000 (—)22 0.160 (—)
000-BBR-987 11:05:48.35 [166.45147705°] 38:23:39.7 [38.39435577°] 69 6.929 (0.100)24 1.296 (0.141)
000-BBR-967 11:04:43.86 [166.18275452°] 38:14:46.8 [38.24633408°] 76 7.553 (0.056)16 0.472 (0.087)
000-BBR-971 11:04:57.26 [166.23858643°] 38:24:38.0 [38.41055679°] 79 7.859 (0.071)16 0.464 (0.108)
000-BBR-918 11:03:18.00 [165.82499695°] 38:08:25.7 [38.14047241°] 102 10.250 (0.100)23 0.980 (0.173)
000-BBR-922 11:03:22.43 [165.84346008°] 38:23:51.0 [38.39749908°] 104 10.390 (0.100)23 0.090 (0.173)
000-BBR-949 11:04:11.55 [166.04812622°] 38:00:16.7 [38.00463867°] 118 11.792 (0.043)29 0.477 (0.094)
000-BBR-975 11:05:12.86 [166.30358887°] 38:28:56.2 [38.48227692°] 119 11.940 (0.043)29 0.825 (0.140)
000-BLX-000 11:03:26.19 [165.85913086°] 38:01:18.6 [38.02183151°] 123 12.291 (0.060)29 0.520 (0.122)
000-BBR-982 11:05:33.09 [166.38787842°] 38:17:54.5 [38.29847336°] 126 12.608 (0.072)29 0.787 (0.155)
000-BBR-986 11:05:43.74 [166.43225098°] 38:09:07.5 [38.15208435°] 128 12.842 (0.044)29 0.570 (0.107)
000-BBR-925 11:03:25.00 [165.85417175°] 38:10:17.1 [38.17141724°] 134 13.371 (0.048)29 0.897 (0.125)
000-BLW-999 11:03:47.51 [165.94795227°] 38:18:24.6 [38.30683517°] 137 13.742 (0.031)29 0.790 (0.147)
000-BLX-001 11:03:56.40 [165.98500061°] 38:18:45.8 [38.31272125°] 141 14.142 (0.049)29 0.617 (0.174)
000-BBR-968 11:04:51.13 [166.21304321°] 38:17:10.6 [38.28627777°] 144 14.373 (0.004)10 0.646 (0.008)
  • 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