Paris Observatory Geodetic VLBI Center

Radio source coordinate time series for 1221+809 (2025b, independent mode)

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

Right ascension: 185.9187232078642°
Declination: 80.6678723725402°
No. sessions: 172
No. delays: 12631
Defining: Yes
RMS(α cos δ) = 2.0186 mas
RMS(δ) = 1.8970 mas

Quarterly time series for 1221+809 (2025b, 4 global solutions)

Data

Right ascension: 185.9187240081770°
Declination: 80.6678723563687°
No. sessions: 150
No. delays: 10563
Defining: Yes
RMS(α cos δ) = 0.1364 mas
RMS(δ) = 0.1518 mas