Paris Observatory Geodetic VLBI Center

Radio source coordinate time series for 1809+170 (2026b, independent mode)

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

Right ascension: 272.9299309773316°
Declination: 17.0825717459826°
No. sessions: 7
No. delays: 786
Defining: No
RMS(α cos δ) = 1.7170 mas
RMS(δ) = 1.2865 mas
Variability ellipse semimajor axis = 2.0879 mas
Variability ellipse semiminor axis = 0.4940 mas
Variability ellipse position angle = -54.1 deg
Equivalent α-δ correlation = -0.88

Observed in only 7 session(s)

Quarterly time series for 1809+170 (2026b, 4 global solutions)

Data

Right ascension: 272.9299311186336°
Declination: 17.0825715897561°
No. sessions: 7
No. delays: 786
Defining: No
RMS(α cos δ) = 0.1845 mas
RMS(δ) = 0.1984 mas
Variability ellipse semimajor axis = 0.2162 mas
Variability ellipse semiminor axis = 0.1633 mas
Variability ellipse position angle = -37.3 deg
Equivalent α-δ correlation = -0.26

Observed in only 7 session(s)