Paris Observatory Geodetic VLBI Center

Radio source coordinate time series for 1557+234 (2026b, independent mode)

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

Right ascension: 239.9675106018743°
Declination: 23.2824246646460°
No. sessions: 3
No. delays: 271
Defining: No
RMS(α cos δ) = 0.2861 mas
RMS(δ) = 1.0331 mas
Variability ellipse semimajor axis = 1.0595 mas
Variability ellipse semiminor axis = 0.1626 mas
Variability ellipse position angle = 12.9 deg
Equivalent α-δ correlation = 0.81

Observed in only 3 session(s)

Quarterly time series for 1557+234 (2026b, 4 global solutions)

Data

Right ascension: 239.9675107551896°
Declination: 23.2824243677101°
No. sessions: 3
No. delays: 271
Defining: No
RMS(α cos δ) = 0.0247 mas
RMS(δ) = 0.1993 mas
Variability ellipse semimajor axis = 0.1993 mas
Variability ellipse semiminor axis = 0.0243 mas
Variability ellipse position angle = -1.3 deg
Equivalent α-δ correlation = -0.18

Observed in only 3 session(s)