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Latest Details
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Name
  PSO J184029.151-270958.907  
AAVSO UID
000-BLN-333 (1 observation)  
Constellation
Sagittarius Sequence
J2000.0
18 40 29.20 -27 09 56.9  (280.12167 -27.16581) Search nearby
B1950.0 18 37 21.72 -27 12 46.4
Galactic coord. 7.335 -9.809
Other names

(Internal only)
ASASSN-V J184028.99-270959.6 USNO-B1.0 0628-0988568  
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Variability type
UG
Spectral type --
Mag. range
13.5 - 19.7 V
Discoverer Jerome Caron and Francois Kugel (Dauban Survey)
Epoch
--
Outburst --
Period --
Rise/eclipse dur. --
Remarks
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1 Schmeer, Patrick Gaia DR2 parallax 2.2216 ± 0.4582 mas (distance ~ 0.5 kpc).
2 Otero, Sebastian Alberto VSP Note: 17.2 mag. star ~2" to the W (variable moving to the SSW due to high ppm).
3 Klajnik, Krisztian High proper motion star. Proper motion values: (deltaRA: -60.507 mas/year; deltaDec: -181.777 mas/year). Not USNO-B1.0 0628-0988572 (V= 17.2), which is ~2" to the W.
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References
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1 J. Caron, F. Kugel, 2013, Dauban Survey --
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Images
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Supporting Documents
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1 Derived positions Klajnik, Krisztian 2018-11-19 18:54 UTC 1; Red circle: 1974.07.22 outburst, UKST, B-band,
coordinates (1974): 18 40 29.319 -27 09 52.194;

2; Yellow circle: 1984.08.28 outburst, ESO-R, R-band, coordinates (1984): 18 40 29.274 -27 09 54.012;

3; VizieR, I/345/gaia dr2,
coordinates (2000): 18 40 29.1982345576 -27 09 56.895085076;
Obj ID: 4072621997368195712;

4; Blue circle: 2013.09.28 outburst, Dauban Survey,
coordinates (2013): 18 40 29.143 -27 09 58.947;

5; VizieR, I/347/gaia2dis,
coordinates (2015): 18 40 29.1279582672 -27 09 59.712626196;
Obj ID: 4072621997368195712;
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Revision History
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3 Schmeer, Patrick 2018-11-21 14:30 UTC Discoverers' first names added.
2 Klajnik, Krisztian 2018-11-19 18:54 UTC Identification corrected. Minimum magnitude derived from Pan-STARRS1. Gaia DR2 position.
1 Otero, Sebastian Alberto 2015-02-03 00:06 UTC Initial submission.

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