Paris Observatory Geodetic VLBI Center

Radio source coordinate time series for 1221+503 (2026b, independent mode)

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

Right ascension: 186.0413273697687°
Declination: 50.0320784528934°
No. sessions: 7
No. delays: 483
Defining: No
RMS(α cos δ) = 0.8691 mas
RMS(δ) = 0.4382 mas
Variability ellipse semimajor axis = 0.9048 mas
Variability ellipse semiminor axis = 0.3587 mas
Variability ellipse position angle = -72.3 deg
Equivalent α-δ correlation = -0.52

Observed in only 7 session(s)

Quarterly time series for 1221+503 (2026b, 4 global solutions)

Data

Right ascension: 186.0413274774798°
Declination: 50.0320785309654°
No. sessions: 7
No. delays: 483
Defining: No
RMS(α cos δ) = 0.5720 mas
RMS(δ) = 0.2673 mas
Variability ellipse semimajor axis = 0.5729 mas
Variability ellipse semiminor axis = 0.2654 mas
Variability ellipse position angle = -86.3 deg
Equivalent α-δ correlation = -0.11

Observed in only 7 session(s)