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Name
  MV Lyr  
AAVSO UID
000-BCF-308 (38849 observations)  
Constellation
Lyra Sequence
J2000.0
19 07 16.30 +44 01 09.0  (286.81792 +44.01917) Search nearby
B1950.0 19 05 44.30 +43 56 22.0
Galactic coord. 74.717 +15.824
Other names

(Internal only)
Please note that aliases shown in grey link to obsolete records.
AAVSO 1904+43 ASAS J190716+4401.1 Downes MV Lyr
KID 8153411 SVS 1021 X 1905-439
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Variability type
NL
Spectral type Op+M5V
Mag. range
12.2 - 18 B
Discoverer --
Epoch
--
Outburst --
Period --
Rise/eclipse dur. --
Remarks
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1 GCVS Team SB (Porb = 0.1336d [D.P.Schneider, P.Young, S.A.Shectman, ApJ 245, 644, 1981.]). Quasiperiodic fadings of different amplitude: Min = 2425558 + 455.5d*E (JD2425500 - 30100); Min = 2430113 + 325.3d*E (JD2430100 - 36900); Min = 2436944 + 357.8d*E (JD2436900 - 44100) [W.Wenzel, B.Furhmann, MVS 9, H.6, 1975, 1983.]. After JD2444100 the mean brightness level became fainter by 5m; outbursts with an amplitude up to 3m of 1 - 2 months duration are observed [I.L.Andronov, S.Yu.Shugarov, IBVS N2418, 1983.]. During the bright level of light, flickering up to 0.4m in 5 Min in U bAnd is observed [M.F.Walker, PASP 66, 71, 1954.]. Soft X-ray source. B - V: 0.00 +- 0.40; U - B: -0.86 + -1.30.
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References
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1 A. Pigulski, G. Pojmanski, B. Pilecki, D. Szczygiel, 2008,
arXiv:0808.2558v2 [astro-ph]
2008arXiv0808.2558P
2 A. Pigulski, G. Pojmanski, B. Pilecki, D. Szczygiel, 2008,
arXiv:0808.2558v2 (online data)
2008arXiv0808.2558P
3 R.A.Downes, 2001, PASP 113, 764 (2006 archival) 2005JAD....11....2D
4 T. Kato, R. Ishioka, M. Uemura, 2002, PASJ 54, 1033 2002PASJ...54.1033K
5 R.A.Downes, 2001, PASP 113, 764 2001PASP..113..764D
6 M.F.Walker, PASP 66, 71, 1954. 1954PASP...66...71W
7 Catalogue of Stellar Spectral Classifications (Skiff, 2005) 1952ApJ...116..592M
8 Planet Hunters --
9 W.Wenzel, B.Furhmann, MVS 9, H.6, 1975, 1983. --
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Revision History
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3 Admin, VSX 2010-01-04 23:43 UTC Position updated from the GCVS version of November 2009.
2 Admin, VSX 2009-09-21 17:28 UTC Update from [2002PASJ...54.1033K]
1 Admin, VSX 2005-12-17 20:33 UTC Initial upload.