Paris Observatory Geodetic VLBI Center

Radio source coordinate time series for 1640+254 (2026b, independent mode)

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

Right ascension: 250.6683825905644°
Declination: 25.3854673392916°
No. sessions: 7
No. delays: 875
Defining: No
RMS(α cos δ) = 0.3857 mas
RMS(δ) = 0.3236 mas
Variability ellipse semimajor axis = 0.4246 mas
Variability ellipse semiminor axis = 0.2706 mas
Variability ellipse position angle = 57.1 deg
Equivalent α-δ correlation = 0.39

Observed in only 7 session(s)

Quarterly time series for 1640+254 (2026b, 4 global solutions)

Data

Right ascension: 250.6683826382656°
Declination: 25.3854673147134°
No. sessions: 7
No. delays: 875
Defining: No
RMS(α cos δ) = 0.1523 mas
RMS(δ) = 0.1183 mas
Variability ellipse semimajor axis = 0.1592 mas
Variability ellipse semiminor axis = 0.1089 mas
Variability ellipse position angle = 66.5 deg
Equivalent α-δ correlation = 0.27

Observed in only 7 session(s)