Paris Observatory Geodetic VLBI Center

Radio source coordinate time series for 1221+809 (independent mode)

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

Right ascension: 185.9187239269492°
Declination: 80.6678723244120°
No. sessions: 131
No. delays: 8626
Defining: Yes
RMS(α cos δ) = 1.2563 mas
RMS(δ) = 1.5100 mas

Quarterly time series for 1221+809

Data - Demeaned data

Right ascension: 185.9187239965476°
Declination: 80.6678723273837°
No. sessions: 125
No. delays: 8408
Defining: Yes
RMS(α cos δ) = 0.1371 mas
RMS(δ) = 0.1558 mas