discov_num |
notes |
refcode |
FIN 368 |
Aa,Ab: Hipparcos parallax 13.56 +/- 0.76 mas. Dynamical parallax 13.3 |
|
|
mas, masses 1.79 and 1.23 Msun. Speckle measures of 1989-91 and |
McA1990 |
|
2009-11 repeat themselves, hinting at a 20 yr period. However, the |
Tok2010 |
|
measure by Mason et al. in 2006.2 does not fall on the same ellipse |
Msn2009 |
|
and had to be ignored. It could refer to another star, as FIN 368 |
|
|
should have been unresolved at that time according to our preliminary |
|
|
orbit, which also matches the speckle non-resolution in 1976.3 and the |
|
|
non-resolutions in 1964-1966 by Finsen. An alternative orbit with P = |
Fin1965a |
|
10.13 yr and e = 0.9 can also be fitted to the data. The Hipparcos |
|
|
measure on 1991.25 contradicts speckle interferometry on 1991.39; it |
HIP1997a |
|
had to be ignored. Nordstrom et al. (1997) noted double lines |
Nrd1997 |
|
broadened by fast axial rotation of 100 km/s and 20 km/s. However, |
|
|
individual RVs measured by these authors during 1987-1991 (near the |
|
|
apastron) do not show any systematic behavior that could be related to |
|
|
the orbit. Continued speckle monitoring will be critical for |
|
|
confirming the orbit. |
|
refcode |
metd |
author |
reference |
Fin1965a |
J j |
Finsen, W.S. |
1965ROCi..124...79F |
Fin1965a |
|
Republic Obs. Circ. 124, 79, 1965 |
|
HIP1997a |
Hh - |
Hipparcos |
1997yCat.1239....0E |
HIP1997a |
|
Hipparcos Catalog, ESA SP-1200, 1997 (incl. Hp photometry, vol. 10) |
|
McA1990 |
Sc j |
McAlister, H.A., Hartkopf, & Franz, O.G. |
1990AJ.....99..965M |
McA1990 |
|
AJ 99, 965, 1990 |
|
Msn2009 |
S+ j |
Mason, B.D., Hartkopf, W.I., Gies, D.R., Henry, T.J., & Helsel, J.W. |
2009AJ....137.3358M |
Msn2009 |
+orb |
AJ 137, 3358, 2009 |
|
Msn2009 |
+lin |
|
|
Nrd1997 |
rv - |
Nordstrom, B., Stefanik, R.P., Latham, D.W., & Andersen, J. |
1997A&AS..126...21N |
Nrd1997 |
|
A&AS 126, 21, 1997 |
|
Tok2010 |
S j |
Tokovinin, A., Mason, B., & Hartkopf, W. |
2010AJ....139..743T |
Tok2010 |
|
AJ 139, 743, 2010 (some measures corrected in Tok2017b) |
2017AJ....154..110T |