AAVSO Home



Current Time: 02 Apr 2025 18:53:25 UTC
Welcome, Guest. You are not logged in.
Log in
    Revise    New Search
Details for Revision 1
Log in to retrieve additional aliases from SIMBAD.
Name
  R Hya  
AAVSO UID
000-BBT-665 (27404 observations)  
Constellation
Hydra Sequence
J2000.0
13 29 42.80 -23 16 53.0  (202.42833 -23.28139) Search nearby
B1950.0 13 26 58.33 -23 01 24.3
Galactic coord. 314.223 +38.750
Other names

(Internal only)
Please note that aliases shown in grey link to obsolete records.
AAVSO 1324-22 ADS 8920 A ASAS J132943-2316.9
BD-22 3601 CD-22 9961 HD 117287
HIP 65835 HR 5080 IRC -20254
RAFGL 1627 SAO 181695  
(Not logged in)  Add name
Variability type
M
Spectral type M6e-M9eS(Tc)
Mag. range
3.5 - 10.9 V
Discoverer --
Epoch
28 Mar 1978 (HJD 2443596) Ephemeris
Outburst --
Period 388.87 d
Rise/eclipse dur. 49%  (191 d)
Remarks
Some references may be clicked to view in new window. Roll over index number to view submission details.
1 Otero, Sebastian Alberto Period keeps shortening. 2017-2022 = 359 d.
2 Otero, Sebastian Alberto Period keeps shortening. 1965-1992 = JD 2442062 + 386.2 x E. 1997-2011 = JD 2452863 + 380 x E.
3 GCVS Team VB A (B 13.0m, 21.6", 324deg). SiO maser. P var. According to [R.Prager, GuL 2, 1936.]; Max = 2328201 + 486d*E (JD2328200 - 31120); Max = 2343512 + 507d*E (JD2343300 - 44800); Max = 2372678 + 485d*E (JD2372200 - 72700); Max = 2380447 + 477d*E (JD2380000 - 81400); Max = 2385160 + 461d*E (JD2384700 - 88000); Max = 2394350 + 448.6d*E (JD2393900 - 2402000); Max = 2403742 + 434d*E (JD2403300 - 04200); Max = 2406363 + 429.5d*E (JD2406000 - 11100); Max = 2413642 + 411d*E (JD2413200 - 14100); Max = 2416563 + 405.5d*E (JD2416100 - 23400); Max = 2424288 + 414.7d*E (JD2423400 - 28500). since JD2428500 - see Table.
(Not logged in)  Add remark
References
Click reference title/citation to view in new window. Roll over index number to view submission details.
1 G.Pojmanski, Acta Astronomica 52, 397, 2002. 2002AcA....52..397P
2 W. Ceraski, 1908, Nouvelles de la Science, Variétés 1908BSAFR..22..241C
3 T. Karlsson, Maxima of Mira stars --
4 General Catalogue of Variable Stars, 4th Edition, Volumes I-III, P.N.
Kholopov et al.
--
External Links
Links open in a new window. Not all links may be valid for this particular target.
Location    Go   
Select a Location for more details.
Supporting Documents
Click document name to open or save. Browser plug-in or other software may be required for viewing.
2 Phase plot Otero, Sebastian Alberto 2011-06-09 01:23 UTC Phase plot with observations between 1965 and 1992 showing a period of 386.6 d, almost 7 days longer than the current one.
1 Phase plot Otero, Sebastian Alberto 2011-06-09 01:21 UTC Phase plot with the current period for R Hya including only observations from 1997 onwards.
(Not logged in)  Add document
Campaigns/Programs
 Binocular program
 Legacy LPV Program
 LPV Program
 LPV Humps
 Percy's Unusual LPVs
Revision History
Currently approved revision is checked. Click revision number to view details of that revision.
5 Otero, Sebastian Alberto 2022-07-29 18:32 UTC Period and epoch from AAVSO data.
4 Billiaert, Bruno 2015-12-29 23:25 UTC discoverers added (1908BSAFR..22..241C)
3 Otero, Sebastian Alberto 2011-06-09 01:21 UTC Period and epoch from ASAS-3 data and photometric compilation.
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.