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Name
  BK Lyr  
AAVSO UID
000-BCW-298 (435 observations)  
Constellation
Lyra Sequence
J2000.0
18 59 13.57 +30 58 46.2  (284.80654 +30.97950) Search nearby
B1950.0 18 57 18.65 +30 54 33.8
Proper motion
RA: -8.5 +/- 7.4 mas/yDec: 6.3 +/- 8.1 mas/ySource: UCAC4
Galactic coord. 61.749 +12.051
Other names

(Internal only)
Please note that aliases shown in grey link to obsolete records.
2MASS J18591357+3058461 AAVSO 1855+30 AN 344.1928
IRAS 18573+3054 NSVS 8202658 NSVS 8254746
NSVS 8270695 ROTSE1 J185913.44+305849.5  
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Variability type
M
Spectral type --
Mag. range
10.6 - 16.6 V
Discoverer Cuno Hoffmeister
Epoch
06 Aug 1997 (HJD 2450667.0) Ephemeris
Outburst --
Period 253.0 d
Rise/eclipse dur. 43%  (109 d)
Remarks
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1 2016JAVSO..44..156K B-V= 1.42; V-R= 1.85
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References
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1 Karlsson, T.; Bengtsson, H.; Wikander, T.; et al., 2016, 50 forgotten Miras 2016JAVSO..44..156K
2 Wozniak, P.R.; et al., 2004, Northern Sky Variability Survey: Public Data
Release
2004AJ....127.2436W
3 C.Akerlof et al., AJ 119, 1901, 2000. 2000AJ....119.1901A
4 P.Ahnert, KVBB N24, 1941. 1941KVeBB...6....4A
5 C.Hoffmeister, Sonn Mitt N16, 1929. 1929MiSon..16....1H
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 = 7.04H = 6.15K = 5.73J - K = 1.31
AllWISE W1 = 5.41W2 = 4.90W3 = 4.23W4 = 3.68W1 - W2 = 0.51W3 - W4 = 0.55
Images
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Supporting Documents
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1 Phase plot Otero, Sebastian Alberto 2015-08-10 16:26 UTC Phase plot with AAVSO and NSVS data.
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Revision History
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4 Karlsson, Thomas 2017-03-10 22:16 UTC Elements, B-V and V-R from 2016JAVSO..44..156K. Discoverer from AN, 234, 33, 1928
3 Otero, Sebastian Alberto 2015-08-10 16:26 UTC Primary record creation. Period, rise duration and range from AAVSO and NSVS data. UCAC4 position.
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.