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Name
  R Aqr  
AAVSO UID
--  
Constellation
Aquarius Sequence
J2000.0
23 43 49.50 -15 17 04.0  (355.95625 -15.28444) Search nearby
B1950.0 23 41 14.37 -15 33 43.3
Galactic coord. 66.517 -70.326
Other names

(Internal only)
Please note that aliases shown in grey link to obsolete records.
AAVSO 2338-15 ASAS J234349-1517.1 BD-16 6352
HD 222800 HIP 117054 HR 8992
IRC -20642 MWC 400 RAFGL 3136
SAO 165849    
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Variability type
M
Spectral type M5e-M8.5e+pec
Mag. range
5.8 - 12.4 V
Discoverer Karl Ludwig Harding
Epoch
16 Dec 1974 (HJD 2442398.00) Ephemeris
Outburst --
Period 386.96 d
Rise/eclipse dur. 42%  (163 d)
Remarks
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1 GCVS Team Symbiotic spectrum. Emissions of H, SII, OIII, FeII, NeIII, OII. Variable radio source. SiO maser. The secondary may be an accreting white dwarf. The star is embedded in an expanding gaseous nebula several hundred years old. A cycle ~24a and longer-term variations are possible in the changes of radial velocities and period.
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References
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1 G.Pojmanski, Acta Astronomica 52, 397, 2002. 2002AcA....52..397P
2 Harding, C. L., 1830, Kleine astron ephemeriden 1830kaep.book.....H
3 T. Karlsson, Maxima of Mira stars --
4 General Catalogue of Variable Stars, 4th Edition, Volumes I-III, P.N.
Kholopov et al.		 --
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Supporting Documents
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Campaigns/Programs
 Binocular program
 Legacy LPV Program
 LPV Program
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Revision History
Currently approved revision is checked. Click revision number to view details of that revision.
5 Harrington, Scott N 2023-08-09 16:36 UTC Discovery year from 1830kaep.book.....H.
4 Otero, Sebastian Alberto 2011-06-29 01:18 UTC Period and epoch from ASAS-3 data.
3 Admin, VSX 2010-01-05 04:43 UTC Update from the GCVS version of November 2009.
2 Molnar, Peter 2006-08-26 07:48 UTC Added discoverer.
1 Admin, VSX 2005-12-18 01:33 UTC Initial database population.

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