Changes of Distance and Position Angle
This table shows the apparent distance between the two stars and their relative position angle: first three columns show data predicted from an orbit calculated in 1937, the next two columns show in 2006, the next three columns show observations reported by the Hanwell Community Observatory.
| Predicted from 1937 Strand orbit | Predicted from 2006 Docobo orbit | Observations 2003 to 2005 | |||||
|---|---|---|---|---|---|---|---|
| Year | distance | position angle | distance | position angle | Date | distance | position angle |
| 1995 | 2.5" | 280 | 2,25" | 277.6 | |||
| 2000 | 1.8" | 267 | 1.50" | 260.9 | |||
| 2002 | 1.5" | 259 | 1.13" | 247.5 | |||
| 2003 | 0.92" | 236.6 | 2003 Dec. | 0.6 arcsec. | 219° | ||
| 2004 | 1.2" | 246 | 0.68" | 218.4 | 2004 Dec. | 0.4 arcsec. | 177° |
| 2005 | 0.44" | 179.8 | 2005 April | 0.27-0.29" | 161±0.6° | ||
| 2006 | 0.8" | 221 | 0.41" | 103.5 | |||
| 2008 | 0.4" | 126 | 0.93" | 41.0 | |||
| 2010 | 0.9" | 44 | 1.39" | 23.6 | |||
Read more about this topic: Gamma Virginis
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