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Table 6.
Statistics on astrometric catalogs used for the reduction of absolute coordinates (obs = ABS) in OCNS2019.
| Catalog | C | N | N% | Ng | Ng% | Years | Vizier CDS ID | Reference | Debiasing table |
|---|---|---|---|---|---|---|---|---|---|
| Unknown | ? | 404 | 2.59% | 46 | 2.41% | 1967–2004 | N/A | N/A | N/A |
| Yale | K | 14 | 0.09% | 3 | 0.16% | 1949–1949 | I/141 | Yale University (1997) | Present paper |
| 2MASS | L | 116 | 0.74% | 13 | 0.68% | 2013–2015 | II/246 | Cutri et al. (2003) | Eggl et al. (2020) |
| Gaia-DR1 | U | 1798 | 11.53% | 29 | 1.52% | 2012–2018 | I/337 | Lindegren et al. (2016) | ibid. |
| Gaia-DR2 | V | 2018 | 12.94% | 76 | 3.98% | 2006–2019 | I/345 | Gaia Collaboration (2018) | ibid. |
| USNO-A2.0 | c | 86 | 0.55% | 5 | 0.26% | 2004–2009 | I/252 | Monet (1998) | ibid. |
| Tycho-1 | f | 108 | 0.69% | 53 | 2.77% | 1986–1993 | I/239 | ESA (1997) | Present paper |
| Tycho-2 | g | 3092 | 19.83% | 1141 | 59.71% | 1963–2014 | I/259 | Høg et al. (2000) | Eggl et al. (2020) |
| ACT | l | 292 | 1.87% | 145 | 7.59% | 1998–2000 | I/246 | Urban et al. (1998) | ibid. |
| GSC-ACT | m | 6 | 0.04% | 1 | 0.05% | 2002–2002 | I/255 | Lasker et al. (1999) | ibid. |
| USNO-B1.0 | o | 454 | 2.91% | 77 | 4.03% | 2002–2014 | I/284 | Monet et al. (2003) | ibid. |
| PPM | p | 460 | 2.95% | 24 | 1.26% | 1993–1998 | I/146; I/193 | Roeser & Bastian (1988), Bastian et al. (1991) | ibid. |
| UCAC-4 | q | 1950 | 12.50% | 124 | 6.49% | 1992–2018 | I/322A | Zacharias et al. (2013) | ibid. |
| UCAC-2 | r | 4550 | 29.17% | 112 | 5.86% | 1996–2013 | I/289 | Zacharias et al. (2004) | ibid. |
| UCAC-3 | u | 170 | 1.09% | 42 | 2.20% | 2009–2012 | I/315 | Zacharias et al. (2010) | ibid. |
| NOMAD | v | 78 | 0.50% | 20 | 1.05% | 2008–2009 | I/297 | Zacharias et al. (2005) | ibid. |
Notes. C is the code of the astrometric catalog, astCat, similar to the MPC flag. N and N% are the number and percentage of observed coordinates, respectively, and Ng and Ng% are those of observation nights.
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