Paris Observatory Geodetic VLBI Center

Radio source coordinate time series for 1637+574 (2026b, independent mode)

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

Right ascension: 249.5560678750952°
Declination: 57.3399941413616°
No. sessions: 394
No. delays: 15376
Defining: No
RMS(α cos δ) = 0.8387 mas
RMS(δ) = 1.3647 mas
Variability ellipse semimajor axis = 1.4214 mas
Variability ellipse semiminor axis = 0.7386 mas
Variability ellipse position angle = 19.0 deg
Equivalent α-δ correlation = 0.40

Quarterly time series for 1637+574 (2026b, 4 global solutions)

Data

Right ascension: 249.5560679615182°
Declination: 57.3399941629214°
No. sessions: 374
No. delays: 15386
Defining: No
RMS(α cos δ) = 0.2130 mas
RMS(δ) = 0.2585 mas
Variability ellipse semimajor axis = 0.2640 mas
Variability ellipse semiminor axis = 0.2062 mas
Variability ellipse position angle = 18.8 deg
Equivalent α-δ correlation = 0.15