UU Columbae = RX J0512.2-3241

Link to this object in VSX

A finding chart for UU Col

SkyView image of UU Col (see important notes).

Position

Equatorial: 05^h12^m13.23^s, -32^d41^m39.7^s (Gaia)
Galactic: l=235.64, b=-34.09

Finding Chart:

Burwitz et al (1996).

Brigntness:

Optical: G=17.6 (Gaia); X-rays: 2.8x10^-12 ergs cm^-2s^-1 (4XMM-DR11)

IP Credential:

**** (Confirmed) The spin period is firmly established from X-ray and optical (including polarimetric) observations. However, there is no spectroscopic or precise measurement of the orbital period, likely around 3.45 hr.

Periods:

Orbital: 0.144 d = 3.45 hr = 12400 s, from optical photometry (?).
Spin: 0.009994 d = 14.39 min = 863.5 s, from optical photometry.
Others: Hint of 928.1 s sideband period.

Inclination:

Distance:

2550 (2150-2990) pc (Gaia EDR3; parallax: 0.341+/-0.070 mas)

References

Burwitz et al. 1996 (ROSAT discovery and optical follow-up)
de Martino et al. 2006 (X-rays)
Evans & Hellier 2007 (X-rays - soft component search)
de Martino 2007 (X-rays)
Brunschweiger et al. 2009 (X-rays)
Katajainen et al. 2010 (optical polarimetry)
Anzolin et al. 2010 (X-ray flickering) Sep
Barrett et al. 2017 (radio)

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

National Aeronautics and Space Administration

Goddard Space Flight Center

IPs

Full Catalog

Related Systems

UU Columbae = RX J0512.2-3241

References