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  bet Lyr  
000-BCW-361 (39369 observations)  
Lyra Sequence
18 50 04.79 +33 21 45.6  (282.51996 +33.36267) Search nearby
B1950.0 18 48 14.00 +33 18 12.5
Proper motion
RA: 1.90 +/- 0.12 mas/yDec: -3.53 +/- 0.20 mas/ySource: F. Van Leeuwen, 2007
Galactic coord. 63.188 +14.783
Other names

(Internal only)
10 Lyr AAVSO 1846+33 ADS 11745 A
BD+33 3223 HD 174638 HD 174639
HIP 92420 HR 7106 IRC +30343
MWC 306 RAFGL 5305S SAO 67451
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Variability type
Spectral type B8II-IIIep
Mag. range
3.30 - 4.35 V
Discoverer Goodricke (1784)
26 Aug 2010 (HJD 2455434.8702) Ephemeris
Outburst --
Period 12.94061713 d
Rise/eclipse dur. --
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1 Otero, Sebastian Alberto HJD 2455434.8702 +12.94061713 * E is a linear ephemeris.
2 GCVS Team ADS 11745 A (B 8.6m, B7V, 46", 149deg; C 13.0m, 47", 248deg). Min II 3.85. P var. Nonlinear terms: +3.883d*10**(-6)*E**2 - 0.10d*10**(-10)*E**3. Light curve shape var. Radio and X-ray source. IR excess.
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1 Ak, H.; et al., 2007, New findings supporting the presence of a thick disc
and bipolar jets in the β Lyrae system
2 Perryman, M. A. C., et al., 1997, The HIPPARCOS Catalogue 1997HIP...C......0E
3 Harmanec, P.; et al., 1996, Jet-like structures in β Lyrae. Results of
optical interferometry, spectroscopy and photometry
4 van Hamme, W.; Wilson, R. E.; Guinan, E. F., 1995, Periodic Light Curve
Changes for Beta Lyrae
5 Z.Klimek, J.M.Kreiner, AA 23, 331, 1973. 1973AcA....23..331K
6 W. Ceraski, 1908, Nouvelles de la Science, Variétés 1908BSAFR..22..241C
7 Bob Nelson's O-C files, 2016 --
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Revision History
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4 Billiaert, Bruno 2015-12-29 18:46 UTC discoverer added (1908BSAFR..22..241C)
3 Otero, Sebastian Alberto 2013-09-13 16:57 UTC Elements from Bob Nelson's O-C files (2012). Range from HIPPARCOS, GCPD, 1996A&A...312..879H, 1995AJ....110.1350V and 2007A&A...463..233A.
2 Admin, VSX 2010-01-04 23:43 UTC Position updated from the GCVS version of November 2009.
1 Admin, VSX 2005-12-17 20:33 UTC Initial upload.