FO Aquarii

FO Aquarii

Observation data Epoch J2000      Equinox J2000
Constellation	Aquarius
Right ascension	22^h 17^m 55.38^s[1]
Declination	−08° 21′ 04.6″[1]
Apparent magnitude (V)	12.7[2]
Characteristics
Apparent magnitude (B)	13.70[1]
Apparent magnitude (R)	13.60[1]
Apparent magnitude (J)	12.87[1]
Apparent magnitude (H)	12.75[1]
Apparent magnitude (K)	12.51[1]
Variable type	DQ[3]
Orbit
Period (P)	4.85 hr[4]
Other designations
2E 4588, 1RXS J221753.9-082115, CS 22886-0021, H 2215-086
Database references
SIMBAD	data
Data sources:
Hipparcos Catalogue, CCDM (2002), Bright Star Catalogue (5th rev. ed.)

FO Aquarii is an intermediate polar^[3] in the constellation Aquarius. The white dwarf and companion star orbit each other with a period of approximately 4.85 hours.^[4] The system has got as bright as apparent magnitude 12.7 and has been as dim as magnitude 14.2.^[5]

References

1. Cutri, R. M.; Skrutskie, M. F.; van Dyk, S.; Beichman, C. A.; Carpenter, J. M.; Chester, T.; Cambresy, L.; Evans, T.; Fowler, J.; Gizis, J.; Howard, E.; Huchra, J.; Jarrett, T.; Kopan, E. L.; Kirkpatrick, J. D.; Light, R. M.; Marsh, K. A.; McCallon, H.; Schneider, S.; Stiening, R.; Sykes, M.; Weinberg, M.; Wheaton, W. A.; Wheelock, S.; Zacarias, N. (2003). "2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)". University of Massachusetts and Infrared Processing and Analysis Center (IPAC/California Institute of Technology). Bibcode:2003yCat.2246....0C.
2. Samus’, N. N.; Goranskii, V. P.; Durlevich, O. V.; Zharova, A. V.; Kazarovets, E. V.; Kireeva, N. N.; Pastukhova, E. N.; Williams, D. B.; Hazen, M. L. (2003). "An electronic version of the second volume of the General Catalogue of Variable Stars with improved coordinates". Astronomy Letters 29 (7): 468–479. Bibcode:2003AstL...29..468S. doi:10.1134/1.1589864.
3. Pekön, Y.; Balman, Ş. (2012). "Orbital-phase-resolved Spectroscopy of the Intermediate Polar FO Aqr Using XMM-Newton Observatory Data". The Astronomical Journal 144 (2): 53. Bibcode:2012AJ....144...53P. doi:10.1088/0004-6256/144/2/53.
4. Osborne, J.; Mukai, K. (1989). "New Orbital and Spin Ephemerides of the Intermediate Polar Fo-Aquarii = H:2215-086". Monthly Notices of the Royal Astronomical Society 238 (3): 1233–1246. Bibcode:1989MNRAS.238.1233O. doi:10.1093/mnras/238.4.1233.
5. VSX; Otero, S. A. (24 May 2011). "FO Aquarii". AAVSO Website. American Association of Variable Star Observers. Retrieved 10 October 2014.