Paris Observatory Geodetic VLBI Center

Radio source coordinate time series for 1800+440 (2026b, independent mode)

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

Right ascension: 270.3846860181000°
Declination: 44.0727396623257°
No. sessions: 177
No. delays: 11417
Defining: No
RMS(α cos δ) = 651.2261 mas
RMS(δ) = 236.4378 mas
Variability ellipse semimajor axis = 695.5687 mas
Variability ellipse semiminor axis = 61.7869 mas
Variability ellipse position angle = -69.5 deg
Equivalent α-δ correlation = -1.04

Quarterly time series for 1800+440 (2026b, 4 global solutions)

Data

Right ascension: 270.3846451074181°
Declination: 44.0727500609309°
No. sessions: 168
No. delays: 11390
Defining: No
RMS(α cos δ) = 0.1756 mas
RMS(δ) = 0.2262 mas
Variability ellipse semimajor axis = 0.2266 mas
Variability ellipse semiminor axis = 0.1751 mas
Variability ellipse position angle = 5.4 deg
Equivalent α-δ correlation = 0.05