Table A.2.
Positions of θ1 Ori A2, in position angle (PA) and separation (Sep) with respect to the primary star.
| Date | MJD | PA (°) | ΔPA (°) | Sep (mas) | Δ Sep (mas) | Reference |
|---|---|---|---|---|---|---|
| 1995.775 | 50001.319 | 350.6 | 2 | 227 | 5 | (1) |
| 1996.247 | 50173.717 | 352.8 | 2 | 227 | 4 | (1) |
| 1996.746 | 50355.977 | 352.7 | 2 | 223 | 4 | (1) |
| 1997.788 | 50736.567 | 353 | 2 | 224 | 2 | (1) |
| 1998.838 | 51120.080 | 353.8 | 2 | 221 | 5 | (1) |
| 1998.841 | 51121.175 | 353.8 | 2 | 221.5 | 5 | (2) |
| 1999.715 | 51440.404 | 355.4 | 2 | 219 | 3 | (1) |
| 1999.737 | 51448.439 | 354.8 | 2 | 215 | 3 | (1) |
| 1999.819 | 51478.390 | 355.1 | 0.5 | 212 | 2.5 | (3) |
| 2000.765 | 51823.916 | 356.2 | 2 | 215 | 4 | (1) |
| 2000.781 | 51829.760 | 356.1 | 2 | 216 | 4 | (1) |
| 2000.781 | 51829.760 | 356 | 2 | 215 | 3 | (1) |
| 2001.186 | 51977.687 | 356 | 2 | 215 | 3 | (1) |
| 2001.718 | 52172.000 | 356.9 | 1 | 205.1 | 3 | (4) |
| 2003.701 | 52896.290 | 3.9 | 1 | 210 | 5 | (5) |
| 2003.945 | 52985.411 | 3.9 | 1 | 209 | 5 | (5) |
| 2004.816 | 53303.544 | 0.3 | 1.6 | 203 | 2 | (6) |
| 2004.822 | 53305.736 | 0.9 | 0.8 | 205 | 3 | (6) |
| 2004.945 | 53350.661 | 4.6 | 1 | 207 | 5 | (5) |
| 2005.06 | 53392.665 | 5.3 | 1 | 208 | 5 | (5) |
| 2005.94 | 53714.085 | 5.9 | 1 | 204 | 5 | (5) |
| 2007.704 | 54358.386 | 6.1 | 1 | 202 | 5 | (5) |
| 2009.019 | 54838.690 | 7.5 | 1 | 199 | 5 | (5) |
| 2009.885 | 55154.996 | 8.2 | 1 | 197 | 5 | (5) |
| 2009.899 | 55160.110 | 8.5 | 1 | 198 | 5 | (5) |
| 2010.26 | 55291.965 | 9.4 | 1 | 197 | 5 | (5) |
| 2010.877 | 55517.324 | 6.5 | 0.3 | 193.1 | 0.5 | (4) |
| 2010.953 | 55545.083 | 6.2 | 2 | 193 | 1 | (5) |
| 2011.827 | 55864.312 | 7.3 | 2 | 193.2 | 1 | (5) |
Notes. The observation time is listed in the first column. The corresponding uncertainties are denoted as ΔPA and ΔSep Positions are taken from indicated references: (1) Schertl et al. (2003), (2) Weigelt et al. (1999), (3) Balega et al. (2004), (4) Close et al. (2012), (5) Grellmann et al. (2013), (6) Balega et al. (2007).
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