Paris Observatory Geodetic VLBI Center

Radio source coordinate time series for 1520+437 (2026b, independent mode)

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

Right ascension: 230.4567366895166°
Declination: 43.6109126971270°
No. sessions: 450
No. delays: 19000
Defining: Yes
RMS(α cos δ) = 279.4855 mas
RMS(δ) = 331.3073 mas
Variability ellipse semimajor axis = 405.8099 mas
Variability ellipse semiminor axis = 152.2992 mas
Variability ellipse position angle = 38.5 deg
Equivalent α-δ correlation = 0.74

Quarterly time series for 1520+437 (2026b, 4 global solutions)

Data

Right ascension: 230.4567245164657°
Declination: 43.6109078306406°
No. sessions: 419
No. delays: 18907
Defining: Yes
RMS(α cos δ) = 0.1941 mas
RMS(δ) = 0.2184 mas
Variability ellipse semimajor axis = 0.2275 mas
Variability ellipse semiminor axis = 0.1833 mas
Variability ellipse position angle = -28.2 deg
Equivalent α-δ correlation = -0.18