ivsopar.obspm.fr

Radio source coordinate time series

 

 

1657+054

Data
SIMBAD - NED - LQAC
MOJAVE - Astrogeo - BVID
Aladin - SDSS

Observed in only 2 session(s)

Right ascension: 255.0998166269563°
Declination: 5.3789151944081°
No. sessions: 2
No. delays: 162
Defining: No
RMS(α cos δ) = 0.1543 mas
RMS(δ) = 0.1618 mas
Cleaned No. sessions: 2
Cleaned RMS(α cos δ) = 0.1543 mas
Cleaned RMS(δ) = 0.1618 mas

Note: Cleaning is a simple outlier elimination algorithm to remove bad sessions. Points whose distance to the mean scaled by the error is larger than 3 are iteratively deleted. The cleaned rms are provided as is and should be taken with some care, especially if the number of sessions is small.