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Name
  BT Mon  
AAVSO UID
000-BBL-732 (10681 observations)  
Constellation
Monoceros Sequence
J2000.0
06 43 47.25 -02 01 13.9  (100.94688 -2.02053) Search nearby
B1950.0 06 41 15.83 -01 58 07.9
Proper motion
RA: -4.1 +/- 4.7 mas/yDec: -22.6 +/- 4.5 mas/ySource: UCAC4
Galactic coord. 213.859 -2.623
Other names

(Internal only)
Please note that aliases shown in grey link to obsolete records.
2MASS J06434723-0201139 AAVSO 0638-01 AN 67.1939
Downes BT Mon UCAC4 440-020574 USNO-B1.0 0879-0155614
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Variability type
NA+EA
Spectral type WD+G8V
Mag. range
4.2: p - 16.4 V
Discoverer A. A. Wachmann
Epoch
14 Dec 1977 (HJD 2443491.7262) Ephemeris
Outburst 1939
Period 0.33381322 d  (8.011517 h)
Rise/eclipse dur. --
Remarks
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1 Otero, Sebastian Alberto VSP Note: 15.35 Vmag star 8" to the N.
2 GCVS Team VB A (B 16.0m, 10", 0deg). After the outburst in 1939 the brightness varies in the range 16.0m - 18.7m with the elements: Min = 2443491.7155 + 0.3338141d*E; D = 0.20p, 0 <= d < = 0.03p. Before the outburst in 1939, according to [B.E.Schaefer, J.Patterson, ApJ 268, 710, 1983.], the following elements were valid: Min = 2429500.207 + 0.3338010d*E. Emission nebula with the radius of 3.8" was discovered in 1981 around the nova [L.N.Berdnikov, Astron. Tsirk. N1259, 1983.].
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References
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1 D. Boyd, 2012, arXiv:1207.2432v1 [astro-ph.SR] 2012arXiv1207.2432B
2 R.A. Downes et al., 2001, PASP 113, 764 (2006 archival version) 2005JAD....11....2D
3 J.M. Kreiner, 2004, Acta Astronomica 54, 207 2004AcA....54..207K
4 D.W. Hoard, The Big List of SW Sextantis Stars 2003AJ....126.2473H
5 R.A. Downes et al., 2001, PASP 113, 764 2001PASP..113..764D
6 Smith, D. A.; Dhillon, V. S.; Marsh, T. R., 1998, The mass of the white
dwarf in the old nova BT MON
1998MNRAS.296..465S
7 E.L.Robinson, R.E.Nather, S.O.Kepler, ApJ 254, 646, 1982. 1982ApJ...254..646R
8 A.A.Wachmann, Bergd Abh 7, N8, 1968. --
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Catalog Data
Information from selected catalogs obtained by cross-matching to 2 arc seconds using the CDS X-Match Service. These data may not be complete.
2MASS J = 14.40H = 13.96K = 13.72J - K = 0.68
Images
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Supporting Documents
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Revision History
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7 Otero, Sebastian Alberto 2014-03-12 19:30 UTC Minimum magnitude from Diego Rodriguez observation submitted to the AAVSO.
6 Otero, Sebastian Alberto 2014-02-28 23:14 UTC Range and spectral type from 1998MNRAS.296..465S.
5 Admin, VSX 2012-08-08 21:48 UTC Update from [2012arXiv1207.2432B].
4 Admin, VSX 2010-01-04 23:43 UTC Position updated from the GCVS version of November 2009.
3 Admin, VSX 2009-10-29 21:32 UTC Update from [2004AcA....54..207K].
2 Admin, VSX 2007-03-23 15:52 UTC Discoverer added.
1 Admin, VSX 2005-12-17 20:33 UTC Initial database population.