Notes for S Ori 70

by Jean Schneider

update: 29 October 2004

The planet:

• Detection method: Direct Imaging
• Type: "Cluster planet"
• Basic data:

  Name:	S Ori 70
  M:	3+2.5-1.5 MJ
  TEff:	1,100200100 K
  Surface gravity:	log g = 3.5 ± 0.5 cm/s2
  Radius:	1.6 RJ
  Distance:	~ 440 pc
  Apparent magnitude:	J = 20.8
  Coordinates	(2000): RA = 05 38 10.1, DEC = -02 36 26

• Remarks:
  14 Nov. 03: The planetary nature of the object is challenged by Burgasser et al (2003).
  The planet may be a member of a planetary system surrounding the quintuple star HR 1931 (Martin & Zapatero 2003)

• References:
  • BURGASSER A., KIRKPATRICK J., McGOVERN M., McLEAN I., PRATO L. & REID 2003
    S Ori 70: Just a Foreground Field Brown Dwarf?
    ApJ, 604, L827
    paper
  • MARTIN E., 2004
    S Ori 70: still a strong cluster planet candidate.
    in Moriond_YLU 2004, A. Chalabaev, Y. Fukui and T. Montmerle Eds.
    paper
  • MARTIN E. & ZAPATERO-OSORIO R.,, 2003
    Spectroscopic Estimate of Surface Gravity for a Planetary Member in the \sigori Cluster.
    ApJ. Letters, 593, L113
    paper
  • ZAPATERO-OSORIO M., BEJAR V., MARTIN E., REBOLO R., BARRADO Y NAVASCUES D., MUNDT R., EISLOFFEL J., & CABALLERO J., 2002
    A Methane Isolated Planetary Mass Object in Orion.
    ApJ., 578, 536
    paper

• Other Web pages:
  • Simbad data