Paris Observatory Geodetic VLBI Center

Radio source coordinate time series for 1831-711 (2026b, independent mode)

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

Right ascension: 279.3696468542933°
Declination: -71.1454324508821°
No. sessions: 121
No. delays: 3208
Defining: Yes
RMS(α cos δ) = 511.1243 mas
RMS(δ) = 198.2038 mas
Variability ellipse semimajor axis = 524.7535 mas
Variability ellipse semiminor axis = 158.6398 mas
Variability ellipse position angle = -76.2 deg
Equivalent α-δ correlation = -0.57

Quarterly time series for 1831-711 (2026b, 4 global solutions)

Data

Right ascension: 279.3696456962808°
Declination: -71.1454317890919°
No. sessions: 111
No. delays: 3075
Defining: Yes
RMS(α cos δ) = 0.2288 mas
RMS(δ) = 0.3034 mas
Variability ellipse semimajor axis = 0.3076 mas
Variability ellipse semiminor axis = 0.2232 mas
Variability ellipse position angle = -13.7 deg
Equivalent α-δ correlation = -0.15