| C1900.0 | : | 17033+5436 |
|---|---|---|
| C2000.0 | : | 170520116+54281215 |
| Comp. | : | B |
| Magn. | : | 5.83 |
| Spect. | : | F7V |
| Bayer $\mu$ Dra | BD +54 1857 | Flamsteed 21 Dra | GAIADR2 1420101696287738368 |
| GAIADR3 1420101696287738368 | HD 154905 | HIP 83608 |
| Element | Value | Std. dev. | |
|---|---|---|---|
| Period (d.) | : | 2270. | |
| Periastron time (xJD-2,400,000.0) | : | 42309. | |
| Reference T0/epoch | : | JD | |
| Eccentricity | : | 0.43 | |
| omega primary (deg.) | : | 205. | |
| K1 (km/s) | : | 2.8 | |
| K2 (km/s) | : | ||
| V0 (km/s) | : | -16.5 | |
| sigma residuals primary | : | ||
| sigma residuals secondary | : | ||
| #RV primary | : | ||
| #RV secondary | : | ||
| Grade | : | 1.0 | |
| Contributor | : | DAO | |
| Status | : | PUB | |
| Bibcode | : | 1979AnTok..17..158I | |
| Derived quantities (on the fly, from the above quantities) | |||
| a1sini (km) | : | 7.89084e+07 | 0 |
| f(m) (sol.mass) | : | 0.00381398 | 0 |
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".
