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Details for Revision 2
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Name
  VSX J000921.8+543943  
AAVSO UID
--  
Constellation
Cassiopeia Sequence
J2000.0
00 09 21.81 +54 39 43.8  (2.34088 +54.66217) Search nearby
B1950.0 00 06 44.79 +54 23 02.2
Galactic coord. 116.815 -7.709
Other names

(Internal only)
1SWASP J000921.98+543943.9 2MASS J00092196+5439439 AllWISE J000921.98+543943.8
GALEX J000922.0+543942 GSC 03656-01328 NSVS 1560234
PPMX J000921.9+543943 UCAC2 50134163 UCAC4 724-001885
USNO-A2 1425.00229853 USNO-B1.0 1446-0005768 VAR CAS 06
Var Cas 2006 WISE J000921.98+543943.9  
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Variability type
Microlense
Spectral type --
Mag. range
7.5 - 11.4 V
Discoverer Akihiko Tago
Epoch
31 Oct 2006 (HJD 2454039.969)
Outburst --
Period --
Rise/eclipse dur. --
Remarks
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1 Schmeer, Patrick The lens star is probably a low-mass star or brown dwarf, with a relatively high proper motion of >20 mas/yr (2008ApJ...677.1268G). Gaia DR2 parallax of the lensed star 0.7096 0.0422 mas (distance 1.36 0.08 kpc).
2 Admin, VSX Determined to be a microlensing event.
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References
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1 Bright New Variable in Cassiopeia AAVSO Special Notice #22
2 Gaudi, B. S.; Patterson, J.; Spiegel,D. S., 2008, Discovery of a very
bright, nearby gravitational microlensing event
2008ApJ...677.1268G
3 Catalogue of Stellar Spectral Classifications (Skiff, 2009-2016) 2007ApJ...670..423F
4 S. Nakano; A. Tago, 2006, CBET No. 711 2006CBET..711....1N
5 M. Mikolajewski; T. Tomov; A. Niedzielski; et al., 2006, ATel #931 2006ATel..931....1M
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Supporting Documents
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Revision History
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5 Schmeer, Patrick 2020-01-31 11:20 UTC Gaia DR2 position.
4 Admin, VSX 2017-12-15 20:20 UTC Spectral type from Skiff (VizieR on-line data: B/mk)
3 Henden, Arne 2009-05-13 18:49 UTC Original coordinates were from CBET 711 and are in error by a couple of arcsec. The revised coordinates are from Tycho2, and agree with those derived by Henden using SRO and UCAC2 during the event. A. Henden 2009
2 Admin, VSX 2006-12-05 06:43 UTC Non-variable, microlensing.
1 Wils, Patrick 2006-12-05 06:41 UTC Initial submission.