Paris Observatory Geodetic VLBI Center

Radio source coordinate time series for 1820+397 (2026b, independent mode)

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

Right ascension: 275.4987526536779°
Declination: 39.7665711357823°
No. sessions: 5
No. delays: 280
Defining: No
RMS(α cos δ) = 0.7709 mas
RMS(δ) = 0.6366 mas
Variability ellipse semimajor axis = 0.9378 mas
Variability ellipse semiminor axis = 0.3465 mas
Variability ellipse position angle = -52.2 deg
Equivalent α-δ correlation = -0.75

Observed in only 5 session(s)

Quarterly time series for 1820+397 (2026b, 4 global solutions)

Data

Right ascension: 275.4987525935576°
Declination: 39.7665711297469°
No. sessions: 5
No. delays: 280
Defining: No
RMS(α cos δ) = 0.4343 mas
RMS(δ) = 0.5991 mas
Variability ellipse semimajor axis = 0.6446 mas
Variability ellipse semiminor axis = 0.3631 mas
Variability ellipse position angle = -26.5 deg
Equivalent α-δ correlation = -0.44

Observed in only 5 session(s)