Paris Observatory Geodetic VLBI Center

Radio source coordinate time series for 1818+551 (2026b, independent mode)

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

Right ascension: 274.7920234100690°
Declination: 55.1857091788941°
No. sessions: 5
No. delays: 439
Defining: No
RMS(α cos δ) = 0.7012 mas
RMS(δ) = 0.3573 mas
Variability ellipse semimajor axis = 0.7754 mas
Variability ellipse semiminor axis = 0.1349 mas
Variability ellipse position angle = -64.3 deg
Equivalent α-δ correlation = -0.91

Observed in only 5 session(s)

Quarterly time series for 1818+551 (2026b, 4 global solutions)

Data

Right ascension: 274.7920232834977°
Declination: 55.1857092054937°
No. sessions: 5
No. delays: 439
Defining: No
RMS(α cos δ) = 0.0679 mas
RMS(δ) = 0.1445 mas
Variability ellipse semimajor axis = 0.1529 mas
Variability ellipse semiminor axis = 0.0462 mas
Variability ellipse position angle = -19.9 deg
Equivalent α-δ correlation = -0.69

Observed in only 5 session(s)