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Name
  RU Mon  
AAVSO UID
000-BBM-032 (5244 observations)  
Constellation
Monoceros Sequence
J2000.0
06 54 12.30 -07 35 45.0  (103.55125 -7.59583) Search nearby
B1950.0 06 51 47.21 -07 31 55.3
Galactic coord. 220.012 -2.844
Other names

(Internal only)
AAVSO 0649-07 AN 43.1905 BD-07 1623
HIP 33163    
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Variability type
EA/DM
Spectral type B9p
Mag. range
10.33 - 11.18 V
Discoverer --
Epoch
01 Mar 1973 (HJD 2441743.1947) Ephemeris
Outburst --
Period 3.584749 d
Rise/eclipse dur. 6%  (5.16 h)
Remarks
Some references may be clicked to view in new window. Roll over index number to view submission details.
1 GCVS Team Min II 11.06; D II var: 0.06P <= DII <= 0.12P; Min II - Min I var: 0.25P < = Min II - Min I <= 0.75P. P var. In the interval JD2429100 - 38409 Min I = 2418357.0140; 3.5846794d(E - 406) - 0.429d cos alpha + 0.06d*sin(2alpha) + 0.010d*cos(3alpha) + 0.003d*sin(4alpha), MinII = 2418355.2220 + 3.5846794d(E - 406) + 0.429d cos alpha + 0.060D*sin(2alpha) - 0.010d cos*3alpha + 0.003d*sin(4alpha) (JD2416900 - 29100); Min I = 2429641.567 + 3.5846391d*(E - 3554) - 0.429d*cos(alpha) + 0.060d*sin(2alpha) + 0.010d*cos(3alpha) + 0.003d*sin(4alpha), Min II = 2429639.775 + 3.5846391d(E - 3554) + 0.429d*cos(alpha) + 0.060d*sin(2alpha) - 0.010d*cos(3alpha) + 0.003d*sin(4alpha), where alpha = 0.01245deg(E - 406) [D.Ya.Martynov, Astron. Zh. 42, 1209, 1965.]. The epochs E are being calculated for Min I from JD hel. 2416901.205, and for Min II - from JD hel. 2416900.248. In the interval JD2438409 - 41743 Min I = 2438409.6045 + 3.584586d(E - 6000) - 0.4290d*cos(alpha) + 0.0620d*sin(2alpha) + 0.0107d*cos(3alpha) + 0.0026d*sin(4alpha) - 0.00036d cos 5alpha, Min II = 2438407.8122 + 3.584586d(E - 6000) + 0.4290d cos alpha + 0.0620d*sin(2alpha) - 0.0107d*cos(3alpha) + 0.0026d*sin(4alpha) + 0.00036d*cos(5alpha), where alpha = 0.012385deg(E - 406) [D.Ya.Martynov, Astron. Zh. 51, Issue 1, 107, 1974.]. since JD2441743 - Min I = 2441743.2633 + 3.584670d(E - 6930) - 0.4336d cos alpha + 0.0634d*sin(2alpha) + 0.0111d*cos(3alpha) + 0.0021d*sin(4alpha), Min II = 2441741.4710 + 3.584689d(E - 6930) + 0.4336d cos alpha + 0.0634d*sin(2alpha) - 0.0111d*cos(3alpha) + 0.0021d*sin(4alpha), where alpha = 70.6deg + 0.0114deg(E - 6094) [D.Ya.Martynov, Astron. Tsirk. N1289, 1, 1983.]. Linear elements for Min I epochs in 1973 - 1990 are given in the Table. Corresponding elements for Min II epochs are: Min II = 2441741.575 + 3.584567d*E. E = 0.38. Apsidal motion period is 285 years.
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References
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1 Bob Nelson's O-C files, 2016 --
2 J. Alfonso-Garzon, A. Domingo, J.M. Mas-Hesse, A. Gimenez, 2012,
arXiv:1210.0821 [astro-ph.IM] (online info)		 2012arXiv1210.0821A
3 W.Ceraski, Mosc Ann (2), 5, Kartenserie 3, 1913. --
4 W. Ceraski, 1905, Une nouvelle variable 43.1905 Monocerotis 1905AN....167..319L
5 D.Ya.Martynov, Astron. Tsirk. N1289, 1, 1983. --
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Revision History
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3 Billiaert, Bruno 2015-12-29 15:00 UTC discoverer added (1905AN....167..319L)
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.

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