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Name
  ASASSN-21gk  
AAVSO UID
000-BNY-612 (1694 observations)  
Constellation
Sagittarius Sequence
J2000.0
17 52 54.58 -16 51 31.0  (268.22742 -16.85861) Search nearby
B1950.0 17 50 00.63 -16 50 53.7
Galactic coord. 11.240 +4.756
Other names

(Internal only)
2MASS J17525458-1651310 EPIC 227898533 UCAC4 366-111185
USNO-A2.0 0675-23131572 USNO-B1.0 0731-0575015 ZTF19abfleei
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Variability type
VAR
Spectral type F/GV
Mag. range
13.10 - 13.87 g
Discoverer ASAS-SN
Epoch
--
Outburst --
Period --
Rise/eclipse dur. --
Remarks
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1 Schmeer, Patrick A spectrum of ASASSN-21gk obtained on 2021 May 2.661 UT shows Balmer, Na DI, Fe I absorption lines. These lines and the profile of the continuum suggest that this object is likely to be a normal (F or G-type) star in common with ASASSN-20da. Although the nature is still unclear, these objects may represent a new type of variable stars (2021ATel14593....1I).
2 Schmeer, Patrick Gaia EDR3 parallax 1.407 ± 0.019 mas (distance 690 ± 7 pc)
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References
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1 K. Isogai; T. Kato; K. Taguchi; F.-J. Hambsch, 2021, ATel #14593 2021ATel14593....1I
2 Kochanek, C. S.; et al., 2017, The All-Sky Automated Survey for Supernovae
(ASAS-SN) Light Curve Server v1.0		 2017PASP..129j4502K
3 ASAS-SN Transients (Shappee et al., 2014) 2014ApJ...788...48S
4 ZTF observations (Lasair online data) --
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Images
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Supporting Documents
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Revision History
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4 Otero, Sebastian Alberto 2021-05-03 19:56 UTC Flag set to variable.
3 Schmeer, Patrick 2021-05-03 07:30 UTC Type and spectral type from 2021ATel14593....1I.
2 Schmeer, Patrick 2021-04-27 17:39 UTC Maximum magnitude from ASAS-SN Sky Patrol data. ZTF transient name and reference added.
1 Otero, Sebastian Alberto 2021-04-20 04:59 UTC Initial submission.

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