Paris Observatory Geodetic VLBI Center

Radio source coordinate time series for 1221+509 (2026b, independent mode)

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

Right ascension: 185.9298704714719°
Declination: 50.6315036108241°
No. sessions: 5
No. delays: 528
Defining: No
RMS(α cos δ) = 6.6364 mas
RMS(δ) = 0.6036 mas
Variability ellipse semimajor axis = 6.6607 mas
Variability ellipse semiminor axis = 0.2057 mas
Variability ellipse position angle = 85.1 deg
Equivalent α-δ correlation = 0.94

Observed in only 5 session(s)

Quarterly time series for 1221+509 (2026b, 4 global solutions)

Data

Right ascension: 185.9298715723397°
Declination: 50.6315035724729°
No. sessions: 5
No. delays: 528
Defining: No
RMS(α cos δ) = 0.1566 mas
RMS(δ) = 0.2288 mas
Variability ellipse semimajor axis = 0.2477 mas
Variability ellipse semiminor axis = 0.1245 mas
Variability ellipse position angle = 26.3 deg
Equivalent α-δ correlation = 0.51

Observed in only 5 session(s)