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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LS Pegasi = S193

Link to this object in VSX

A finding chart for LS Peg

SkyView image of LS Peg (see important notes)

  • Equatorial: 21h51m57.96s, +14d06m53.0s (Gaia)
  • Galactic: l=70.72, b=-30.03
Finding Chart:
Optical G=11.9 (Gaia); X-rays: 6.7x10-12 ergs cm-2s-1 (4XMM-DR11)
IP Credential:
* (Doubtful): This is an optically luminous nova-like system with a moderate X-ray luminosity and there is no credible spin period.
  • Orbital: 0.174774 d = 4.1946 hr = 15100 s, seen in optical spectroscopy.
    HJD = 2450358.8964(9) + 0.174774(3)E
    (Taylor, Thorstensen & Patterson 1999) for the Halpha radial velocity.
  • Spin:
  • Others: 30.9 min modulation was seen in ASCA data but unconfirmed in XMM data, and is unlikely to represent the white dwarf spin.
286.3 (283.2-289.5) pc (Gaia EDR3; parallax: 3.430+/-0.039 mas)


  1. Szkody et al. 1994 (X-rays)
  2. Szkody et al. 1997 (ultraviolet)
  3. Taylor, Thorstensen & Patterson 1999 (optical spectroscopy & photometry)
  4. Martinez-Pais, Rodriguez-Gil & Casares 1999 (optical spectroscopy)
  5. Rodriguez-Gil et al. 2001 (optical spectropolarimetry)
  6. Szkody et al. 2001 (X-rays and optical spectroscopy)
  7. Baskill, Wheatley & Osborne 2005 (X-rays)
  8. Parker, Norton & Mukai 2005 (X-ray timing)
  9. Ramsay et al. 2008 (X-rays)
  10. Anzolin et al. 2010 (X-ray flickering)
  11. Froning et al. 2012 (ultraviolet)
  12. Semena et al. 2013 (optical photometry)
  13. Barrett et al. 2017 (radio)

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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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