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Name
  R Ara  
AAVSO UID
000-BCT-764 (2186 observations)  
Constellation
Ara Sequence
J2000.0
16 39 44.72 -56 59 39.9  (249.93633 -56.99442) Search nearby
B1950.0 16 35 34.92 -56 53 46.7
Proper motion
RA: -7.698 +/- 0.080 mas/yDec: -15.938 +/- 0.063 mas/ySource: Gaia DR1
Galactic coord. 330.352 -6.829
Other names

(Internal only)
1RXS J163943.2-565928 1WGA J1639.7-5659 2MASS J16394472-5659398
2RXP J163945.7-565932 2RXS J163943.2-565931 AAVSO 1631-56
ASAS J163945-5659.7 CCDM J16397-5700A CD-56 6482
CPD-56 7804 HD 149730 HD 149730 A
HIP 81589 HJ 4866A SAO 244037
TYC 8720-2094-2 UCAC4 166-175821 WDS J16397-5700A
XMMSL2 J163944.2-565934    
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Variability type
EA
Spectral type B5V+F1IV
Mag. range
6.90 - 8.57 V
Discoverer Isaac Roberts (1892)
Epoch
12 Aug 1988 (HJD 2447386.12) Ephemeris
Outburst --
Period 4.42526 d
Rise/eclipse dur. 14%  (14.9 h)
Remarks
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1 Otero, Sebastian Alberto Strong period changes.
2 Otero, Sebastian Alberto 0.4 mag. variability at maximum due to mass transfer. ASAS-3 and HIPPARCOS magnitudes contaminated by the B companion (a B9V star with V= 7.80; sep. 3.6"). Range has been corrected. Blended range V= 6.51 - 7.37.
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References
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1 Blane, D.; Blackford, M. G.; Budding, E.; et al., 2019, IBVS #6267 2019IBVS.6267....1B
2 Kervella, P.; Arenou, F.; Mignard, F.; et al., 2019, Stellar and substellar
companions of nearby stars from Gaia DR2. Binarity from proper motion
anomaly		 2019A&A...623A..72K
3 J.S. Nichols et al., 2010, ApJS 188, 473 2010ApJS..188..473N
4 J.S. Nichols et al., 2010, ApJS 188, 473 (online data) 2010ApJS..188..473N
5 Pojmanski, G., 2002, The All Sky Automated Survey 2002AcA....52..397P
6 Perryman, M. A. C.; et al., 1997, The HIPPARCOS and TYCHO catalogues 1997HIP...C......0E
7 E.Hertzsprung, BAN 9, 275, 1942. 1942BAN.....9..275H
8 Cannon, A. J., 1907, Second catalogue of variable stars 1907AnHar..55....1C
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Images
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Supporting Documents
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Revision History
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6 Otero, Sebastian Alberto 2024-09-05 23:24 UTC Period from AAVSO data.
5 Fernig, Leo 2022-04-22 13:33 UTC Discoverer updated from 1907AnHar..55....1C page 20
4 Otero, Sebastian Alberto 2020-03-24 22:00 UTC Range from HIPPARCOS and ASAS-3 data. Period from ASAS-3 data. Spectral type from 2019A&A...623A..72K. Gaia DR2 position.
3 Admin, VSX 2010-10-26 00:23 UTC Update from [2010ApJS..188..473N].
2 Admin, VSX 2010-01-05 04:43 UTC Update from the GCVS version of November 2009.
1 Admin, VSX 2005-12-18 01:33 UTC Initial upload.

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