Paris Observatory Geodetic VLBI Center

Radio source coordinate time series for 1817+157 (2026b, independent mode)

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

Right ascension: 274.9095388443049°
Declination: 15.7290910640662°
No. sessions: 7
No. delays: 533
Defining: No
RMS(α cos δ) = 0.4274 mas
RMS(δ) = 0.4037 mas
Variability ellipse semimajor axis = 0.5416 mas
Variability ellipse semiminor axis = 0.2288 mas
Variability ellipse position angle = -47.3 deg
Equivalent α-δ correlation = -0.70

Observed in only 7 session(s)

Quarterly time series for 1817+157 (2026b, 4 global solutions)

Data

Right ascension: 274.9095388290129°
Declination: 15.7290910156393°
No. sessions: 7
No. delays: 533
Defining: No
RMS(α cos δ) = 0.1929 mas
RMS(δ) = 0.2553 mas
Variability ellipse semimajor axis = 0.3151 mas
Variability ellipse semiminor axis = 0.0555 mas
Variability ellipse position angle = -36.5 deg
Equivalent α-δ correlation = -0.93

Observed in only 7 session(s)