Paris Observatory Geodetic VLBI Center

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

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

Right ascension: 198.0595372869811°
Declination: 25.5203266526209°
No. sessions: 5
No. delays: 325
Defining: No
RMS(α cos δ) = 1.3507 mas
RMS(δ) = 0.7850 mas
Variability ellipse semimajor axis = 1.5311 mas
Variability ellipse semiminor axis = 0.3107 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 (2026a, 4 global solutions)

Data

Right ascension: 198.0595373712263°
Declination: 25.5203266174909°
No. sessions: 5
No. delays: 325
Defining: No
RMS(α cos δ) = 0.3712 mas
RMS(δ) = 0.1395 mas
Variability ellipse semimajor axis = 0.3754 mas
Variability ellipse semiminor axis = 0.1276 mas
Variability ellipse position angle = 80.8 deg
Equivalent α-δ correlation = 0.38

Observed in only 5 session(s)