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Name
  i Boo  
AAVSO UID
000-BBV-828 (623 observations)  
Constellation
Bo÷tes Sequence
J2000.0
15 03 47.30 +47 39 14.6  (225.94708 +47.65406) Search nearby
B1950.0 15 02 08.46 +47 50 53.1
Proper motion
RA: -445.84 mas/yDec: 19.86 mas/ySource: F. Van Leeuwen, 2007
Galactic coord. 80.370 +57.066
Other names

(Internal only)
44 Boo B 1RXS J150348.3+473924 ADS 9494 B
BD+48 2259 B GJ 575.0 B HD 133640 B
HIP 73695 HR 5618 B SAO 45357 B
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Variability type
EW/KW
Spectral type G2V+G2V
Mag. range
5.80 - 6.39 V
Discoverer --
Epoch
27 Dec 1967 (HJD 2439852.4903) Ephemeris
Outburst --
Period 0.2678159 d  (6.42758 h)
Rise/eclipse dur. --
Remarks
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1 Otero, Sebastian Alberto Secondary component of a 2" visual binary (A= 5.19V). Combined range V= 4.70 - 4.88.
2 GCVS Team ADS 9494 B (A 5.1m, G0; a = 3.8", e = 0.43, P = 225a). Min II 6.29. P var. Min = 2434132.517 + 0.267812271d*E + 0.115242d*10**(-9)*E**2 (1916 - 1958) [H.Schneller, IBVS N57, 1964.]; Min = 2438513.4166 + 0.2678143d*E (1947 - 1967) [H.W.Duerbeck, IBVS N1023, 1975.]; since 1968 - see Table. Detailed studies of period changes [A.Purgathofer, F.Prochazka, Wien Mitt 13, N10, 151, 1967., M.A.Svechnikov, L.P.Surkova, Perem. Zvezdy 18, N6, 571, 1973., F.van't Veer, AsAp 20, 131, 1972., D.M.Popper, P.J.Dumont, AJ 82, 216, 1977.]. Sudden period changes at JD2423800, 29300, 32300, 35150 are possible. The shape of the light curve and the depth of Min II are also variable. According to [L.Binnendijk, AJ 60, 355, 1955.], it is also possible that ADS 9494 A is variable, with the amplitude up to 0.09m.
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References
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1 Perryman, M. A. C.; et al., 1997, The HIPPARCOS and TYCHO catalogues 1997HIP...C......0E
2 H.W.Duerbeck, IBVS N1023, 1975. 1975IBVS.1026....1D
3 Bob Nelson's O-C files, 2016 --
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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 = 3.42H = 3.12K = 3.01J - K = 0.41
SDSS-DR12 u = 7.37g = 6.01r = 5.78i = 12.51z = 5.35u - g = 1.36r - i = -6.74
Images
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Supporting Documents
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Revision History
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4 Otero, Sebastian Alberto 2017-05-30 21:28 UTC VSD AUID added.
3 Otero, Sebastian Alberto 2015-11-27 02:57 UTC Range form HIPPARCOS 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.