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Name
  ASASSN-18ey  
AAVSO UID
000-BMP-599 (448168 observations)  
Constellation
Ophiuchus Sequence
J2000.0
18 20 21.95 +07 11 07.3  (275.09146 +7.18536) Search nearby
B1950.0 18 17 56.61 +07 09 43.6
Galactic coord. 35.854 +10.159
Other names

(Internal only)
1RXS J182022.9+071125 2MASS J18202194+0711073 AllWISE J182021.94+071107.2
DASCH_J182021.7+071111 GALEX J182021.9+071107 GSC2.3 N1QV010706
Gaia18asi MAXI J1820+070 PNV J18202184+0711091
PSO J182021.941+071107.257 URAT1 486-270102 USNO-A2.0 0900-12487311
USNO-B1.0 0971-0414244 WISE J182021.94+071107.2 XPM 194-0496404
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Variability type
LMXB/BHXB:/XN
Spectral type --
Mag. range
11.7 - 18.3: V
Discoverer ASAS-SN
Epoch
--
Outburst --
Period 0.1417 d  (3.40 h)
Rise/eclipse dur. --
Remarks
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1 Schmeer, Patrick Two previous outbursts in DASCH data: 1898 October 17 (HJD 2414580.48222), pmag. 12.7; 1934 July 13 (HJD 2427631.60671); pmag. 14.0 (re-calibrated photographic "B" magnitudes and estimated outburst-recurrence time of 40 years from 2019ATel13066....1K).
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References
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1 N. Kojiguchi; T. Kato; K. Isogai; et al., 2019, ATel #13066 2019ATel13066....1K
2 M. Richmond, 2018, ATel #11596 2018ATel11596....1R
3 C. Littlefield, 2018, ATel #11421 2018ATel11421....1L
4 M. C. Baglio; D. M. Russell; F. Lewis, 2018, ATel #11418 2018ATel11418....1B
5 D. Denisenko, 2018, ATel #11400 2018ATel11400....1D
6 T. Kawamuro; et al., 2018, ATel #11399 2018ATel11399....1K
7 Gaia Alerts, 2018 (online data) --
8 ASAS-SN Transients (Shappee et al., 2014) 2014ApJ...788...48S
9 DASCH DR6 (online data) --
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Images
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Supporting Documents
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Revision History
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9 Schmeer, Patrick 2019-03-13 07:20 UTC Remark and references added.
8 Schmeer, Patrick 2019-03-12 10:36 UTC Gaia Alerts reference added.
7 Otero, Sebastian Alberto 2018-05-03 00:27 UTC Period from 2018ATel11596....1R.
6 Otero, Sebastian Alberto 2018-04-24 22:51 UTC Maximum magnitude from AAVSO data.
5 Otero, Sebastian Alberto 2018-03-28 04:54 UTC Maximum magnitude from AAVSO data.
4 Otero, Sebastian Alberto 2018-03-15 18:39 UTC Maximum magnitude from 2018ATel11421....1L. Approximate minimum magnitude derived from Gaia DR1 and Pan-STARRS1.
3 Otero, Sebastian Alberto 2018-03-14 18:24 UTC Type and range from 2018ATel11418....1B.
2 Schmeer, Patrick 2018-03-12 07:26 UTC Maximum magnitude from 2018ATel11400....1D. Type from 2018ATel11399....1K.
1 Otero, Sebastian Alberto 2018-03-07 23:46 UTC Minimum magnitude derived from Pan-STARRS1. PPMXL position.