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Latest Details
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Name
  bet Lyr  
AAVSO UID
000-BCD-386 (50911 observations)  
Constellation
Lyra Sequence
J2000.0
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)
Please note that aliases shown in grey link to obsolete records.
10 Lyr AAVSO 1846+33 ADS 11745 A
ASASSN-V J185120.79+332128.7 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
DPV:/EB
Spectral type B8II-IIIep
Mag. range
3.30 - 4.35 V
Discoverer Goodricke (1784)
Epoch
05 Sep 2020 (HJD 2459097.95) Ephemeris
Outburst --
Period 12.944 d
Rise/eclipse dur. --
Remarks
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1 Otero, Sebastian Alberto VSP Note: Companion 46" to the SE (V= 7.22; B= 7.14).
2 Otero, Sebastian Alberto Linear elements HJD 2459097.95 + 12.944 x E are valid around 2021.
3 Otero, Sebastian Alberto Variable long period of ~275 d. (Mennickent, 2017).
4 Otero, Sebastian Alberto HJD 2455434.8702 +12.94061713 * E is a linear ephemeris.
5 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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References
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1 C. Lloyd, 2018, Summer Eclipsing Binaries BAA-VSS Circular #176, 2018
2 T. Jayasinghe; et al., 2020 (in preparation) --
3 Mennickent, R. E., 2017, Long photometric cycles in hot Algols (Invited
review)		 --
4 Bob Nelson's O-C files, 2016 --
5 Ak, H.; et al., 2007, New findings supporting the presence of a thick disc
and bipolar jets in the β Lyrae system		 2007A&A...463..233A
6 Perryman, M. A. C., et al., 1997, The HIPPARCOS Catalogue 1997HIP...C......0E
7 Harmanec, P.; et al., 1996, Jet-like structures in β Lyrae. Results of
optical interferometry, spectroscopy and photometry		 1996A&A...312..879H
8 van Hamme, W.; Wilson, R. E.; Guinan, E. F., 1995, Periodic Light Curve
Changes for Beta Lyrae		 1995AJ....110.1350V
9 Z.Klimek, J.M.Kreiner, AA 23, 331, 1973. 1973AcA....23..331K
10 W. Ceraski, 1908, Nouvelles de la Science, Variétés 1908BSAFR..22..241C
External Links
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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 = 3.37H = 3.35K = 3.19J - K = 0.17
AllWISE W3 = 2.21W4 = 1.71W3 - W4 = 0.50
Images
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Supporting Documents
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Campaigns/Programs
 BRITE campaign
Revision History
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8 Otero, Sebastian Alberto 2021-07-19 20:19 UTC Period and epoch from AAVSO data.
7 Otero, Sebastian Alberto 2020-06-26 22:57 UTC Epoch from AAVSO data.
6 Otero, Sebastian Alberto 2019-06-08 03:02 UTC Type from Mennickent (2017).
5 Otero, Sebastian Alberto 2018-06-05 00:38 UTC Elements from BAA-VSS Circular #176.
4 Billiaert, Bruno 2015-12-29 23:46 UTC discoverer added (1908BSAFR..22..241C)
3 Otero, Sebastian Alberto 2013-09-13 20:57 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 2010-01-05 04:43 UTC Position updated from the GCVS version of November 2009.
1 Admin, VSX 2005-12-18 01:33 UTC Initial upload.

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