Paris Observatory Geodetic VLBI Center

Radio source coordinate time series for 1231+811 (2026b, independent mode)

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

Right ascension: 188.3037281967575°
Declination: 80.9094353468515°
No. sessions: 12
No. delays: 1214
Defining: No
RMS(α cos δ) = 47.4417 mas
RMS(δ) = 46.8172 mas
Variability ellipse semimajor axis = 68.0992 mas
Variability ellipse semiminor axis = 13.9617 mas
Variability ellipse position angle = -45.3 deg
Equivalent α-δ correlation = -1.09

Observed in only 12 session(s)

Quarterly time series for 1231+811 (2026b, 4 global solutions)

Data

Right ascension: 188.3037209241603°
Declination: 80.9094368054430°
No. sessions: 12
No. delays: 1214
Defining: No
RMS(α cos δ) = 0.2128 mas
RMS(δ) = 0.3032 mas
Variability ellipse semimajor axis = 0.3162 mas
Variability ellipse semiminor axis = 0.1929 mas
Variability ellipse position angle = -21.0 deg
Equivalent α-δ correlation = -0.33

Observed in only 12 session(s)