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Table 2
Positions of the close visual companion of θ1 Ori C.
Date | PA | ΔPA | Diff. pred. PA* | Sep. | ΔSep. | Diff. pred. Sep.* | Ref. |
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[′′] | [′′] | [′′] | ||
|
|||||||
1997.784 | 226.0 | 3 | 33 | 2 | 1 | ||
1998.383 | 222.0 | 5 | 37 | 4 | 1 | ||
1999.737 | 214.0 | 2 | 43 | 1 | 2 | ||
1999.819 | 213.5 | 2 | 42 | 1 | 3 | ||
2000.873 | 210.0 | 2 | 40 | 1 | 3 | ||
2001.184 | 208.0 | 2 | 38 | 1 | 2 | ||
2003.8 | 19.3 | 2 | 29 | 2 | 3 | ||
2003.925 | 19.0 | 2 | 29 | 2 | 3 | ||
2003.928 | 19.1 | 2 | 29 | 2 | 3 | ||
2004.822 | 10.5 | 4 | 24 | 4 | 3 | ||
2005.921 | 342.74 | 2 | 13.55 | 0.5 | 3 | ||
2006.149 | 332.3 | 3.5 | 11.80 | 1.11 | 4 | ||
2007.019 | 274.9 | 1 | 11.04 | 0.5 | 5 | ||
2007.143 | 268.1 | 5.2 | 11.94 | 0.31 | 4 | ||
2007.151 | 272.9 | 8.8 | 12.13 | 1.58 | 4 | ||
2007.175 | 266.6 | 2.1 | 12.17 | 0.37 | 4 | ||
2007.206 | 265.6 | 1.9 | 12.28 | 0.41 | 4 | ||
2007.214 | 263.0 | 2.3 | 12.14 | 0.43 | 4 | ||
2007.901 | 238.0 | 2 | 19.8 | 2 | 5 | ||
2007.923 | 241.2 | 1 | 19.07 | 0.5 | 5 | ||
2008.027 | 237.0 | 3 | 19.7 | 3 | 5 | ||
2008.027 | 236.5 | 3 | 19.6 | 3 | 5 | ||
2008.071 | 236.2 | 2 | 20.1 | 2 | 5 | ||
2008.148 | 234.6 | 1 | 21.17 | 0.5 | 5 | ||
2008.173 | 236.4 | 1 | 21.27 | 0.5 | 5 | ||
2010.762 | 216.3 | 2 | +0.9 | 42.6 | 1 | +0.7 | This paper |
2010.986 | 215.7 | 2 | +1.3 | 43.4 | 1 | +0.8 | This paper |
2010.989 | 215.0 | 2 | +0.6 | 43.1 | 1 | +0.5 | This paper |
Notes.
(*)
Differences between observed new orbit positions and positions predicted by the orbit obtained by Kraus et al. (2009).
References. (1) Weigelt et al. (1999); (2) Schertl et al. (2003); (3) Kraus et al. (2007); (4) Patience et al. (2008); (5) Kraus et al. (2009).
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