Paris Observatory Geodetic VLBI Center

Radio source coordinate time series for 1639+230 (2026b, independent mode)

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

Right ascension: 250.3551035150223°
Declination: 22.9510980489333°
No. sessions: 753
No. delays: 32126
Defining: No
RMS(α cos δ) = 3758.6512 mas
RMS(δ) = 4667.2036 mas
Variability ellipse semimajor axis = 6013.6048 mas
Variability ellipse semiminor axis = 503.1846 mas
Variability ellipse position angle = 38.9 deg
Equivalent α-δ correlation = 1.01

Quarterly time series for 1639+230 (2026b, 4 global solutions)

Data

Right ascension: 250.3551148787551°
Declination: 22.9511202051196°
No. sessions: 723
No. delays: 32004
Defining: No
RMS(α cos δ) = 0.1647 mas
RMS(δ) = 0.2627 mas
Variability ellipse semimajor axis = 0.2630 mas
Variability ellipse semiminor axis = 0.1643 mas
Variability ellipse position angle = -3.3 deg
Equivalent α-δ correlation = -0.06