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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V2400 Ophiuchi = RX J1712.6-2414

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

A finding chart for V2400 Oph

SkyView image of V2400 Oph (see important notes).

  • Equatorial: 17h12m36.42s, -24d14m44.7s (Gaia)
  • Galactic: l=359.87, b=+8.74
Finding Chart:
Buckley et al. (1995).
Optical G=14.1 (Gaia); X-rays: 4.8x10-11 ergs cm-2s-1 (BAT 157m; 14-195 keV), 5.0x10-11 ergs cm-2s-1 (4XMM-DR11)
IP Credential:
**** (Confirmed): While the spin and beat periods have been measured in many independent studies, the orbital period has never been directly measured. The accretion flow is also poorly understood.
  • Orbital: 3.43 hr period is inferred from the spin and sideband periods.
  • Spin: 0.010737 d = 15.46 min = 927.66 s, from optical polarimetry.
  • Others: 16.72 min =1003 s period dominates the emission lines, optical photometry, and X-ray photometry.
About 10o?
699.7 (688.9-709.4) pc (Gaia EDR3; parallax: 1.387+/-0.022 mas)


  1. Haberl & Motch 1995 (X-rays)
  2. Buckley et al. 1995 (optical spectroscopy, photometry & polarimetry)
  3. Garlick 1996 (model of optical emission lines)
  4. Vaeth 1997 (cycltron modeling)
  5. Buckley et al. 1997 (X-rays)
  6. Hellier, Mukai & Osborne 1998 (X-ray spectroscopy)
  7. Ezuka & Ishida 1999 (X-ray spectroscopy)
  8. Hellier 1999 (spin tomography)
  9. Ferrario & Wickramasinghe 1999 (model of spin modulation)
  10. Ramsay 2000 (X-ray spectroscopy)
  11. Hellier & Beardmore 2002 (X-rays and optical spectroscopy)
  12. de Martino et al. 2004 (X-rays)
  13. Suleimanov, Revnivtsev & Ritter 2005 (X-ray spcectroscopy)
  14. Parker, Norton & Mukai 2005 (X-ray timing)
  15. Barlow et al. 2006 (hard X-ray survey)
  16. Evans & Hellier 2007 (X-rays - soft component search)
  17. Revnivtsev et al. 2008 (analysis of INTEGRAL sample)
  18. Landi et al. 2009 (X-rays)
  19. Brunschweiger et al. 2009 (X-rays)
  20. Scaringi et al. 2010 (X-rays)
  21. Anzolin et al. 2010 (X-ray flickering)
  22. Yuasa et al. 2010 (X-ray spectroscopy)
  23. Galis et al. 2010 (X-rays)
  24. Pretorius & Mukai 2014 (space density)
  25. Schwope 2018 (space density)
  26. Suleimanov, Doroshenko & Werner 2019 (X-ray spectroscopy)
  27. Joshi et al. 2019 (X-rays)
  28. Isakova, Zhilkin & Bisikalo 2019 (MHD Simulation)
  29. Shaw et al. 2020 (X-ray spectroscopy)
  30. Langford 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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