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Table 1
Astrometric measurements of GG Tau Aa – Ab.
| Date (UT) | d [mas] | PA [°] | Reference | ||
|
|
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| 1990 Nov. 2 | 255. ± 10. | 9. ± 2. | Leinert et al. (1993) | ||
| 1991 Oct. 21 | 260. ± 10. | 2. ± 1. | Ghez et al. (1995) | ||
| 1993 Dec. 26 | 260. ± 10. | 3. ± 2. | Roddier et al. (1996) | ||
| 1994 Jan. 27 | 246. ± 4. | 357.8 ± 0.4 | Woitas et al. (2001) | ||
| 1994 Jul. 25 | 250.2 ± 2.6 | 358.8 ± 0.45 | Ghez et al. (1997) | ||
| 1994 Sep. 24 | 258. ± 4. | 357. ± 2. | Ghez et al. (1995) | ||
| 1994 Oct. 18 | 242. ± 3. | 0.9 ± 0.5 | Ghez et al. (1995) | ||
| 1994 Dec. 22 | 239. ± 5. | 357.2 ± 2. | Roddier et al. (1996) | ||
| 1995 Oct. 8 | 247. ± 4. | 356.9 ± 0.7 | Woitas et al. (2001) | ||
| 1996 Sep. 29 | 245. ± 4. | 355.5 ± 0.4 | Woitas et al. (2001) | ||
| 1996 Dec. 6 | 243.6 ± 4.6 | 354.9 ± 1.3 | White & Ghez (2001) | ||
| 1997 Sep. 27 | 250. ± 3. | 354.3 ± 1. | Krist et al. (2002) | ||
| 1997 Oct. 10 | 248. ± 2. | 353.9 ± 0.4 | McCabe et al. (2002) | ||
| 1997 Nov. 16 | 247. ± 5. | 353.6 ± 0.4 | Woitas et al. (2001) | ||
| 1998 Oct. 10 | 260. ± 4. | 350.7 ± 0.4 | Woitas et al. (2001) | ||
| 2001 Jan. 21 | 248. ± 14. | 348.6 ± 2.4 | Hartigan & Kenyon (2003) | ||
| 2001 Feb. 9 | 245. ± 4. | 348.7 ± 0.3 | Tamazian et al. (2002) | ||
| 2002 Dec. 12 | 250.7 ± 1.5 | 346.0 ± 1.5 | Duchêne et al. (2004) | ||
| 2003 Dec. 13 | 250.7 ± 0.8 | 344.2 ± 0.1 | this work | ||
| 2006 Nov. 20 | 252.3 ± 0.7 | 339.0 ± 0.1 | this work | ||
| 2009 Oct. 5 | 252.5 ± 0.3 | 334.5 ± 0.1 | this work | ||
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