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Name
  CP Gru  
AAVSO UID
000-BCV-983 (30351 observations)  
Constellation
Grus Sequence
J2000.0
21 58 37.76 -45 44 36.2  (329.65733 -45.74339) Search nearby
B1950.0 21 55 28.78 -45 58 58.3
Proper motion
RA: 13.474 +/- 0.041 mas/yDec: 12.320 +/- 0.031 mas/ySource: Gaia DR1
Galactic coord. 352.611 -51.199
Other names

(Internal only)
Please note that aliases shown in grey link to obsolete records.
2MASS J21583776-4544362 AAVSO 2152-46 ASAS J215838-4544.6
BV 1402 CD-46 14144 CPD-46 10327
GC 30736 GSC 08437-01694 Gaia DR3 6561698791124472960
HD 208614 HIP 108486 NSV 13977
PPM 327764 SAO 230922 TIC 389726435
TYC 8437-1694-1    
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Variability type
EA
Spectral type A5V
Mag. range
7.66 - 8.02 V
Discoverer Hipparcos
Epoch
26 Jul 2018 (HJD 2458325.723) Ephemeris
Outburst --
Period 2.086230 d
Rise/eclipse dur. 19%  (9.51 h)
Remarks
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1 Otero, Sebastian Alberto Period changes. Mean elements for 1989 (Hipparcos) - 2023 (TESS) are HJD 2448501.724 + 2.086219 x E. Elements in the table are based on TESS data (2018-2023). Changing O'Connell effect.
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References
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1 Ricker, G. R.; et al., 2014, Transiting Exoplanet Survey Satellite (TESS) 2014SPIE.9143E..20R
2 Pojmanski, G., 2002, The All Sky Automated Survey 2002AcA....52..397P
3 European Space Agency, 1997, The Hipparcos and Tycho Catalogues, ESA
SP-1200		 1997yCat.1239....0E
External Links
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Catalog Data
Information from selected catalogs obtained by cross-matching to 2 arc seconds using the CDS X-Match Service. These data may not be complete.
2MASS J = 7.25H = 7.18K = 7.06J - K = 0.19
AllWISE W1 = 7.00W2 = 7.01W3 = 7.04W4 = 6.79W1 - W2 = -0.01W3 - W4 = 0.25
GALEX-DR5 FUV = 13.43NUV = 11.78FUV - NUV = 1.65
Images
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Supporting Documents
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2 Phase plot - Period 1989-2023 (all data) Otero, Sebastian Alberto 2026-06-09 18:29 UTC Phase plot, folded with the best period for all the data (Hipparcos 1989-1993, ASAS-3 2000-2009 and TESS 2018-2023).
1 Phase plot - Min I - TESS period Otero, Sebastian Alberto 2026-06-09 18:27 UTC Zoomed version of the phase plot, folded with the period based on TESS observations from 2018 to 2023, using TESS, Hipparcos and ASAS-3 data.
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Revision History
Currently approved revision is checked. Click revision number to view details of that revision.
4 Otero, Sebastian Alberto 2026-06-09 18:27 UTC Period, epoch, eclipse duration and range from TESS, Hipparcos and ASAS-3 data.
3 Admin, VSX 2010-01-05 04:43 UTC Position updated from the GCVS version of November 2009.
2 Admin, VSX 2007-03-23 19:53 UTC Added period, epoch and spectral type from [1997yCat.1239....0E].
1 Admin, VSX 2005-12-18 01:33 UTC Initial database population.

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