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Table 1:

Multi-epoch astrometric measurements of WDS 19312+3607.

Epoch 		$\rho$ $\theta$ Sourcea
  [arcsec] [deg]  

1952 Jul. 17 		$45.5\pm0.4$ 348 POSS-I Red
1988 Jun. 13 $46.2\pm0.4$ 347 POSS-II Blue
1992 Aug. 31 $46.0\pm0.4$ 348 POSS-II Red
1993 Jun. 13 $45.7\pm0.4$ 347 POSS-II Infrared
1994 Aug. 20 $45.82\pm0.10$ 347.3 SDSS DR7
1998 Jun. 01 $45.80\pm0.12$ 347.4 2MASS
2001 Aug. 26 $45.90\pm0.06$ 347.5 CMC14
2004 Oct. 30 $45.81\pm0.10$ 347.4 IRAC
2008 Mar. 07 $45.82\pm0.15$ 347.3 Tacande
2008 May 05 $45.70\pm0.15$ 347.4 CAFOS
2008 Oct. 23 $45.80\pm0.15$ 347.3 Tacande

Notes. (a) POSS: SuperCOSMOS (Hambly et al. 2001) digitisations of the First (1948-1958) and Second (1985-2000) Palomar Observatory Sky Survey; 2MASS: Two-Micron All-Sky Survey (Skrutskie et al. 2006); SDSS DR7: Sloan Digital Sky Survey (Abazajian et al. 2009); CMC14: Carlsberg Meridian Catalog 14 (Muiños 2006); IRAC: Spitzer Heritage Archive, program name/identification INR/3286; CAFOS: Calar Alto Faint Object Spectrograph with the Site#1d_15 detector at the 2.2 m Calar Alto Teleskop in Almería, Spain; Tacande: dual CCD camera SBIG ST-8XME at the 0.4 m Telescopio del Observatorio de Tacande in La Palma, Spain.


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