Paris Observatory Geodetic VLBI Center

Radio source coordinate time series for 1257+839 (2026b, independent mode)

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

Right ascension: 194.4017704944764°
Declination: 83.7086897567536°
No. sessions: 5
No. delays: 433
Defining: No
RMS(α cos δ) = 0.9546 mas
RMS(δ) = 0.5719 mas
Variability ellipse semimajor axis = 1.0754 mas
Variability ellipse semiminor axis = 0.2859 mas
Variability ellipse position angle = 61.4 deg
Equivalent α-δ correlation = 0.83

Observed in only 5 session(s)

Quarterly time series for 1257+839 (2026b, 4 global solutions)

Data

Right ascension: 194.4017708259905°
Declination: 83.7086898067034°
No. sessions: 5
No. delays: 433
Defining: No
RMS(α cos δ) = 0.6414 mas
RMS(δ) = 0.4970 mas
Variability ellipse semimajor axis = 0.7067 mas
Variability ellipse semiminor axis = 0.3987 mas
Variability ellipse position angle = 59.4 deg
Equivalent α-δ correlation = 0.47

Observed in only 5 session(s)