<Paris Observatory Geodetic VLBI Center

Radio source coordinate time series for 1638+398 (2026a, independent mode)

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

Right ascension: 250.1234746850933°
Declination: 39.7794523969012°
No. sessions: 2119
No. delays: 171293
Defining: No
RMS(α cos δ) = 255.4003 mas
RMS(δ) = 159.2309 mas

Quarterly time series for 1638+398 (2026a, 4 global solutions)

Data

Right ascension: 250.1234699029905°
Declination: 39.7794523427847°
No. sessions: 2019
No. delays: 164061
Defining: No
RMS(α cos δ) = 0.1679 mas
RMS(δ) = 0.1823 mas