Paris Observatory Geodetic VLBI Center

Radio source coordinate time series for 1309+257 (2026b, independent mode)

Data - BVID - NED - MOJAVE - SIMBAD - PanSTARRS-1

Right ascension: 198.0595372872173°
Declination: 25.5203266520182°
No. sessions: 5
No. delays: 325
Defining: No
RMS(α cos δ) = 1.3509 mas
RMS(δ) = 0.7852 mas
Variability ellipse semimajor axis = 1.5313 mas
Variability ellipse semiminor axis = 0.3110 mas
Variability ellipse position angle = 61.2 deg
Equivalent α-δ correlation = 0.89

Observed in only 5 session(s)

Quarterly time series for 1309+257 (2026b, 4 global solutions)

Data

Right ascension: 198.0595373777384°
Declination: 25.5203266200741°
No. sessions: 5
No. delays: 325
Defining: No
RMS(α cos δ) = 0.3734 mas
RMS(δ) = 0.1378 mas
Variability ellipse semimajor axis = 0.3806 mas
Variability ellipse semiminor axis = 0.1164 mas
Variability ellipse position angle = 78.2 deg
Equivalent α-δ correlation = 0.51

Observed in only 5 session(s)