Paris Observatory Geodetic VLBI Center

Radio source coordinate time series for 1638+118 (2026b, independent mode)

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

Right ascension: 250.2453858446752°
Declination: 11.7345034909651°
No. sessions: 5
No. delays: 455
Defining: No
RMS(α cos δ) = 0.6466 mas
RMS(δ) = 0.3101 mas
Variability ellipse semimajor axis = 0.6482 mas
Variability ellipse semiminor axis = 0.3067 mas
Variability ellipse position angle = 85.3 deg
Equivalent α-δ correlation = 0.13

Observed in only 5 session(s)

Quarterly time series for 1638+118 (2026b, 4 global solutions)

Data

Right ascension: 250.2453858280813°
Declination: 11.7345034207794°
No. sessions: 4
No. delays: 452
Defining: No
RMS(α cos δ) = 0.0865 mas
RMS(δ) = 0.1547 mas
Variability ellipse semimajor axis = 0.1549 mas
Variability ellipse semiminor axis = 0.0862 mas
Variability ellipse position angle = -3.4 deg
Equivalent α-δ correlation = -0.07

Observed in only 4 session(s)