Paris Observatory Geodetic VLBI Center

Radio source coordinate time series for 1639-287 (2026b, independent mode)

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

Right ascension: 250.7473880704674°
Declination: -28.8327617120077°
No. sessions: 9
No. delays: 242
Defining: No
RMS(α cos δ) = 3.0200 mas
RMS(δ) = 2.9644 mas
Variability ellipse semimajor axis = 3.2516 mas
Variability ellipse semiminor axis = 2.7085 mas
Variability ellipse position angle = -47.9 deg
Equivalent α-δ correlation = -0.18

Observed in only 9 session(s)

Quarterly time series for 1639-287 (2026b, 4 global solutions)

Data

Right ascension: 250.7473879275811°
Declination: -28.8327617008849°
No. sessions: 9
No. delays: 242
Defining: No
RMS(α cos δ) = 0.4496 mas
RMS(δ) = 2.1304 mas
Variability ellipse semimajor axis = 2.1563 mas
Variability ellipse semiminor axis = 0.3018 mas
Variability ellipse position angle = 8.9 deg
Equivalent α-δ correlation = 0.73

Observed in only 9 session(s)