Paris Observatory Geodetic VLBI Center

Radio source coordinate time series for 1638+398 (2025b, independent mode)

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

Right ascension: 250.1234731414190°
Declination: 39.7794524240670°
No. sessions: 2147
No. delays: 181666
Defining: No
RMS(α cos δ) = 211.3853 mas
RMS(δ) = 132.4786 mas

Quarterly time series for 1638+398 (2025b, 4 global solutions)

Data

Right ascension: 250.1234698960632°
Declination: 39.7794523433044°
No. sessions: 1910
No. delays: 145658
Defining: No
RMS(α cos δ) = 0.1750 mas
RMS(δ) = 0.1758 mas