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Name
  ASASSN-18su  
AAVSO UID
000-BMT-205 (4813 observations)  
Constellation
Hydra Sequence
J2000.0
12 57 51.50 -28 30 15.2  (194.46458 -28.50422) Search nearby
B1950.0 12 55 08.97 -28 14 03.2
Galactic coord. 304.640 +34.346
Other names

(Internal only)
1RXP J125752-2830.1 1WGA J1257.8-2830 2RXP J125751.9-283013
APOP 41300+0012140 AT 2018fez CWISE J125751.34-283015.2
GALEX J125751.4-283015 GSC2.3 S6L0012140 Gaia18dwy
PSO J125751.372-283015.290 SMSS J125751.34-283015.3 SSS_J125751.5-283015
USNO-A2.0 0600-15289079 USNO-B1.0 0614-0283559 USNO-B1.0 0614-0283561
VHS J125751.34-283015.3 WD J125751.50-283015.22 WISE J125751.42-283014.9
WISEA J125751.40-283015.0    
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Variability type
UGSU
Spectral type --
Mag. range
9.9 - 18.2 V
Discoverer ASAS-SN
Epoch
--
Outburst --
Period --
Rise/eclipse dur. --
Remarks
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1 Schmeer, Patrick A bright (and probably long) outburst was detected on 2018 August 17; it had a very long fading tail. A fainter outburst began on 2022 June 24 (vsnet-alert 26854). Gaia DR3 parallax 5.50 ± 0.13 mas (distance 181 ± 4 pc).
2 Schmeer, Patrick Possible historical outbursts found in DASCH plates: 1890.395, 1923.351, 1939.195, and 1946.080 (vsnet-alert 22432).
3 Schmeer, Patrick ePESSTO spectroscopic classification as a CV (ATel #11969). Gaia DR2 parallax 5.5218 ± 0.1578 mas (distance 180 ± 5 pc).
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References
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1 T. Kato, 2022, vsnet-alert #26856 --
2 R. Stubbings, 2022, vsnet-alert #26852 --
3 P. Schmeer, 2022, vsnet-alert #26854 --
4 E. Callis; Z. Kostrzewa-Rutkowska; M. Fraser; et al., 2018, ATel #11969 2018ATel11969....1C
5 K. Z. Stanek; C. S. Kochanek; J. V. Shields, 2018, ATel #11968 2018ATel11968....1S
6 Gaia alerts, 2018 (online data) --
7 N. Kojiguchi, 2018, vsnet-alert #22432 --
8 Transient Name Server, 2018 (online data) --
9 Kochanek, C. S.; et al., 2017, The All-Sky Automated Survey for Supernovae
(ASAS-SN) Light Curve Server v1.0		 2017PASP..129j4502K
10 ASAS-SN Transients (Shappee et al., 2014) 2014ApJ...788...48S
External Links
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Images
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Supporting Documents
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Revision History
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7 Otero, Sebastian Alberto 2022-06-29 05:09 UTC Type from vsnet-alert 26856.
6 Schmeer, Patrick 2022-06-28 19:19 UTC Remark and references added.
5 Otero, Sebastian Alberto 2021-07-26 21:08 UTC Maximum magnitude derived from ASAS-SN data. Minimum magnitude derived from Gaia Alerts data.
4 Otero, Sebastian Alberto 2018-12-21 06:18 UTC Gaia identification and reference added.
3 Schmeer, Patrick 2018-08-20 11:56 UTC Remark from vsnet-alert 22432 added.
2 Schmeer, Patrick 2018-08-20 09:55 UTC Remark added.
1 Schmeer, Patrick 2018-08-18 23:31 UTC Maximum magnitude from ASAS-SN data. Minimum magnitude derived from Pan-STARRS1. Gaia DR2 position.

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