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Latest Details
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Name
  DAV V21  
AAVSO UID
000-BPW-377 (No observations)  
Constellation
Cetus Sequence
J2000.0
02 09 15.90 -00 56 19.3  (32.31625 -0.93869) Search nearby
B1950.0 02 06 42.83 -01 10 29.3
Galactic coord. 161.659 -57.835
Other names

(Internal only)
2MASS J02091587-0056191 ATO J032.3161-00.9387 CMC15 J020915.8-005619
DENIS J020915.8-005619 GALEX J020915.8-005618 GSC 04689-00783
GSC2.2 S002120371 GSC2.3 S0GZ000071 RAVE J020915.9-005619
TIC 38376846 TYC 4689-783-1 UCAC4 446-002751
ULAS J020915.86-005619.1 URAT1 446-002800 USNO-A2.0 0825-00499695
USNO-B1.0 0890-0022060 WISE J020915.86-005619.1  
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Variability type
VAR
Spectral type --
Mag. range
12.41 - 12.71 g
Discoverer Artem Doronin
Epoch
--
Outburst --
Period --
Rise/eclipse dur. --
Remarks
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1 Artem, Doronin FUV-NUV=-0.22. Based on the absolute magnitude (M=+3.8) and GALEX colors, probably a hot subdwarf + main sequence star binary. Classified as a spectroscopic binary with P=0.6126997 d in 2022yCat.1357....0G.
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References
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1 Gaia collaboration; et al., 2022. Gaia Data Release 3 (Gaia DR3) Part 3
Non-single stars		 2022yCat.1357....0G
2 Masci, F. J.; et al., 2019, The Zwicky Transient Facility: Data Processing,
Products, and Archive		 2019PASP..131a8003M
3 Kochanek, C. S.; et al., 2017, The All-Sky Automated Survey for Supernovae
(ASAS-SN) Light Curve Server v1.0		 2017PASP..129j4502K
External Links
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Images
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Supporting Documents
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2 DAV V21 light curve Artem, Doronin 2024-05-02 15:44 UTC Light curve from ASAS-SN and ZTF DR 20 data
1 DAV V21 finder chart Artem, Doronin 2024-04-21 13:06 UTC Color-combined DSS finder chart with 10'x10' FOV
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Revision History
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1 Artem, Doronin 2024-05-03 15:01 UTC Gaia DR3 position. Range from ASAS-SN data.

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