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Name
  IU Aur  
AAVSO UID
000-BBJ-361 (8694 observations)  
Constellation
Auriga Sequence
J2000.0
05 27 52.40 +34 46 58.3  (81.96833 +34.78286) Search nearby
B1950.0 05 24 32.80 +34 44 31.1
Proper motion
RA: 1.16 +/- 1.57 mas/yDec: -0.35 +/- 0.71 mas/ySource: F. Van Leeuwen, 2007
Galactic coord. 173.046 -0.031
Other names

(Internal only)
BD+34 1051 HD 35652 HIP 25565
SAO 58059    
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Variability type
EB/SD
Spectral type B0p+B1pV
Mag. range
8.19 - 8.83 V
Discoverer --
Epoch
22 Feb 1964 (HJD 2438448.4063) Ephemeris
Outburst --
Period 1.81147536 d
Rise/eclipse dur. --
Remarks
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1 GCVS Team P var. There is an additional periodic term in the elements: -0.00627d*sin (2.221deg*E + 15deg). The ratio of Min II depth to Min I depth is 0.78. There is secular deepening of both minima. The depth of Min I increases by 0.016m per year. The range of light variation in the Table is given for 1979.0 (Min II 8.69). Orbital inclination is increasing by 0.5deg per year [J.A.Eaton, IBVS N1614, 1979.] due to orbital precession caused by a third body. Spectrum description [A.Mammano, R.Margoni, R.Stagni, AsAp 59, N1, 9, 1977.].
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References
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1 P.Mayer, BAC 27, 308, 1976. 1976BAICz..27..308M
2 Bob Nelson's O-C files, 2016 --
3 P.Mayer, Rise Hvezd 46, 167, 1965. --
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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 = 7.63H = 7.60K = 7.59J - K = 0.04
AllWISE W1 = 7.61W2 = 7.64W3 = 7.58W4 = 7.39W1 - W2 = -0.03W3 - W4 = 0.19
APASS-DR9
Images
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Supporting Documents
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Revision History
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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.