## Basic data (System:947)

C1900.0 C2000.0 : 17033+5436 : 170520116+54281215 : B : 5.83 : F7V

## Identifiers:

 Bayer $\mu$ Dra BD +54 1857 Flamsteed 21 Dra GAIADR2 1420101696287738368 HD 154905 HIP 83608

## Orbit

Element Value Std. dev. : 2270. : 42309. : JD : 0.43 : 205. : 2.8 : : -16.5 : : : : : 1.0 : DAO : PUB : 1979AnTok..17..158I : 7.89084e+07 0 : 0.00381398 0

## Note

This is the fainter component of A.D.S. 10345, for which a number of orbits
have been computed. Even the period of the visual pair is uncertain, however,
except for the fact that it is to be measured in centuries. The component A is
similar in magnitude and spectral type. Ishida finds evidence for a
low-amplitude variation in the velocity of B, which he ascribes to binary
motion. Confirmation is desirable. There is also a companion C, 13.8m at about
13".


## Plot

Encapsulated PostScript file

D.Pourbaix