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Name
  BL Her  
AAVSO UID
000-BBZ-969 (916 observations)  
Constellation
Hercules Sequence
J2000.0
18 01 09.22 +19 14 56.7  (270.28842 +19.24908) Search nearby
B1950.0 17 58 58.84 +19 14 57.0
Proper motion
RA: -4.080 +/- 0.107 mas/yDec: -11.864 +/- 0.121 mas/ySource: Gaia DR1
Galactic coord. 45.161 +19.463
Other names

(Internal only)
Please note that aliases shown in grey link to obsolete records.
AAVSO 1756+19 AN 84.1929 ASAS J180109+1915.0
HD 347827 HIP 88242  
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Variability type
CWB
Spectral type F0-F6II-III
Mag. range
9.70 - 10.62 V
Discoverer --
Epoch
07 Jun 1973 (HJD 2441841.289) Ephemeris
Outburst --
Period 1.307445 d
Rise/eclipse dur. 24%
Remarks
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1 GCVS Team P var. P = 1.3074604d (JD2415000 - 35000); since JD2435000 - see Table. Another possible representation: Max = 2434999.402 + 1.307457d*E - 3.9d*10**(-10)*E**2 (JD2415000 - 42000). [Fe/H] = 0.0.
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References
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1 G.Pojmanski, Acta Astronomica 52, 397, 2002. 2002AcA....52..397P
2 L.Szabados, Bud Mitt N70, 1977. 1977CoKon..70....1S
3 R.I.Chuprina, Perem. Zvezdy 10, N2, 124, 1955. 1954PZ.....10..124C
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 = 9.38H = 9.18K = 9.12J - K = 0.27
AllWISE W1 = 8.85W2 = 8.87W3 = 8.80W4 = 8.77W1 - W2 = -0.02W3 - W4 = 0.03
APASS-DR9 B = 10.97V = 10.48g' = 10.61r' = 10.32i' = 10.13B - V = 0.49
Images
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Supporting Documents
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Revision History
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3 Otero, Sebastian Alberto 2013-11-09 04:04 UTC Period and rise duration from ASAS-3 data.
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.