V455 And
V515 And
AE Aqr
FO Aqr
XY Ari
V405 Aur
V647 Aur
HT Cam
MU Cam
DW Cnc
V709 Cas
V1033 Cas
V1025 Cen
TV Col
TX Col
UU Col
V2069 Cyg
V2306 Cyg
YY Dra
PQ Gem
V418 Gem
DQ Her
V1323 Her
EX Hya
NY Lup
V2400 Oph
V2731 Oph
V598 Peg
GK Per
AO Psc
V667 Pup
WX Pyx
V1223 Sgr
CC Scl
V1062 Tau
AX J1740.1
AX J1740.2
AX J1853.3
IGR J08390
IGR J15094
IGR J16500
IGR J16547
IGR J17195
IGR J18173
IGR J18308
IGR 19267
RX J2133

Full Catalog

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EI Ursae Majoris = PG 0834+488 = 1H0832+488

A finding chart for EI UMa

SkyView image of EI UMa (see important notes).

  • Equatorial: 08h38m21.99s, +48d38m02.1s (J2000)
    (Green et al. 1982)
  • Galactic: l=170.88, b=+37.36
Finding Chart:
Green et al. (1982)
Optical: B~13.4-14.9; X-rays:
IP Credential:
**** (Confirmed): The evidence is mounting that this is an IP, although this is still on the weak side of "confirmed." NB Joe Patterson is not convinced about this.
  • Orbital: 0.2681 d = 6.43 hr = 23164 s, seen in optical spectroscopy (Thorstensen 1986). No long-term ephemeris available.
  • Spin: 0.00858 d = 12.36 min = 741.6 s, seen in ASCA data. (Baskill et al. 2005).
  • Others: 0.0089078 d = 12.871 min = 769.63 s sideband period, seen in optical photometry more prominently than the spin (Kozhevnikov 2010).
~23 deg?
750 (+100, -200) pc (Pretorius & Mukai 2014)


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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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