V455 And
V515 And
AE Aqr
FO Aqr
V349 Aqr
XY Ari
V405 Aur
V647 Aur
HT Cam
MU Cam
DW Cnc
V709 Cas
V1025 Cen
V1033 Cas
TV Col
TX Col
UU Col
V2069 Cyg
V2306 Cyg
DO Dra
PQ Gem
V418 Gem
DQ Her
V1323 Her
V1460 Her
V1674 Her
EX Hya
NY Lup
V2400 Oph
V2731 Oph
V3037 Oph
V598 Peg
GK Per
AO Psc
HZ Pup
V667 Pup
WX Pyx
V1223 Sgr
V4743 Sgr
CC Scl
V1062 Tau
AX J1740.1
AX J1832.3
AX J1853.3
CTCV J2056
CXO J174954
IGR J04571
IGR J08390
IGR J15094
IGR J16500
IGR J16547
IGR J17014
IGR J17195
IGR J18151
IGR J18173
IGR J18308
IGR J19267
PBC J0927.8
PBC J1841.1
RX J1804
RX J2015
RX J2113
RX J2133
RX J2306
Swift J0717
Swift J1839
Swift J2006
Swift J2138

Full Catalog

Related Systems

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V1025 Centauri = RX J1238-38

Links to this object in VSX and in Swift BAT 157 month survey

A finding chart for V1025 Cen

SkyView image of V1025 Cen (see important notes).

  • Equatorial: 12h38m16.18s, -38d42m45.6s (Gaia)
  • Galactic: l=300.12, b=+24.09
Finding Chart:
Buckley et al (1998).
Optical: G=17.2 (Gaia); X-rays: 9.1x10-12 ergs cm-2s-1 (BAT 157m; 14-195 keV), 2.3x10-11 ergs cm-2s-1 (4XMM-DR11)
IP Credential:
***** (Ironclad LLIP) The orbital period is seen in radial velocity modulation, and the spin period is seen in the X-rays, optical photometry and optical spectroscopy.
  • Orbital: 0.05876 d = 1.410 hr = 5077 s, from optical photometry.
  • Spin: 0.0248448 d = 35.7765 min = 2146.59 s, from optical photometry.
    HJD(max)=2449807.308 + 0.0248448 E
    (Buckley et al 1998).
  • Others: Also a 1860 s period, the first harmonic of the orbital sideband.
196.0 (193.0-199.2) pc (Gaia EDR3; parallax: 5.095+/-0.075 mas)


  1. Hellier, Mukai & Osborne 1998 (X-ray spectroscopy)
  2. Buckley et al 1998 (ROSAT discovery and optical follow-up)
  3. Hellier, Beardmore & Buckley 1998 (X-ray timing)
  4. Hellier 1999 (spin tomography)
  5. Ferrario & Wickramasinghe 1999 (model of spin modulation)
  6. Ramsay 2000 (X-ray spectroscopy)
  7. Hellier, Wynn & Buckley 2002 (optical spectroscopy)
  8. Parker, Norton & Mukai 2005 (X-ray timing)
  9. Brunschweiger et al. 2009 (X-rays)
  10. Suleimanov, Doroshenko & Werner 2019 (X-ray spectroscopy)
  11. Littlefield et al. 2022 (optical photometry)
  12. Covington et al. 2022 (optical photometry)

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Please send your comments, suggestions etc. to Koji.Mukai@nasa.gov and/or Koji.Mukai@umbc.edu
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