VSX : Detail for DAV V21

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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)

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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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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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Location

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Images

Please review Digitized Sky Survey Acknowledgment and Copyright.

Size	5' x 5' (297 x 298 pixels)
Center	02 09 15.90 -00 56 19.3 (J2000)
Source	STScI
Survey	Red, all sky, 1.0 arcsec/pixel
	Negative

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