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Details for Revision 3
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Name
  eta Gem  
AAVSO UID
000-BBK-904 (33716 observations)  
Constellation
Gemini Sequence
J2000.0
06 14 52.66 +22 30 24.5  (93.71942 +22.50681) Search nearby
B1950.0 06 11 51.29 +22 31 22.9
Galactic coord. 188.853 +2.519
Other names

(Internal only)
7 Gem AAVSO 0608+22 ADS 4841 A
BD+22 1241 DO 12034 HD 42995
HIP 29655 HR 2216 IRAS 06118+2231
IRC +20139 Propus RAFGL 4478S
SAO 78135 Tejat Prior  
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Variability type
EA+SRA
Spectral type M3IIIab
Mag. range
3.1 - 3.7 V
Discoverer --
Epoch
01 Apr 1988 (HJD 2447253) Ephemeris
Outburst --
Period 2979 d  (8.16 y)
Rise/eclipse dur. 4%  (17 weeks)
Remarks
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1 Otero, Sebastian Alberto SR elements: JD 2451145 + 232.8 x E. Eclipses have an amplitude of ~0.3 mag. (V).
2 GCVS Team VB A (B 8.8m, GO III - IV, 1.60", 269.4deg, 1977). SB1 (P = 2983d [D.B.McLaughlin, S.E.A. Van Dijke, ApJ 100, 63, 1944.]). Epoch of Min brightness is given. The deepest minima (corresponding to the middles of the descending branches of the radial velocity curve) are satisfied by the elements: Min = 2429355 + 2984d*E [H.van Schewick, AN 279, 65, 1950.].
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References
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1 V.P.Zessewitsch, Variable Stars and Methods of Their Studies, (in russian)
M., 1970.
--
2 B.Ljunggren, T.Oja, Ark Astr 3, N31, 439, 1965. 1965ArA.....3..439L
3 Cannon, A. J., 1907, Second catalogue of variable stars 1907AnHar..55....1C
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Supporting Documents
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Campaigns/Programs
 Legacy LPV Program
 LPV Program
Revision History
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5 Fernig, Leo 2022-02-18 22:11 UTC Discoverer updated from 1907AnHar..55....1C page 12
4 Otero, Sebastian Alberto 2020-10-27 05:06 UTC Type corrected.
3 Otero, Sebastian Alberto 2020-10-27 04:16 UTC Type, period, epoch, eclipse duration and range from AAVSO data.
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.