HD 100777, a yellow main-sequence star in Leo

HD 100777 (HIP 56572)

HD 100777 is a yellow main-sequence star in the constellation Leo. At 161 light years away, it shines at an apparent visual magnitude of 8.42. The iron abundance of HD 100777 is +0.24 (173.8% of the Sun). It is moving through the Galaxy at a speed of 8.1 km/s relative to the Sun. Its projected Galactic orbit carries it between 24,000 and 35,200 light years from the center of the Galaxy. HD 100777 has one confirmed planet known to date (July 2013).

Sky position: RA 11h 35.9m, Dec -4° 45.6'

Common designations: HIP 56572, HD 100777

Galactic Orbit of HD 100777
(compared to the Sun)

E

ccentricity: 18.9% vs. 16.0%

Angle φ : 14.2°vs. 26.0°

Semi-major axis : 9,084 pc vs. 8,686 pc

Semi-minor axis: 8,919 pc vs. 8,574 pc

Focus-to-center

: 1,720 pcvs. 1,388 pc

Semilatus rectum : 8,758 pc vs. 8,464 pc

Perigalacticon: 7,364 pc vs. 7,297 pc

Apogalacticon

: 10,803 pcvs. 10,074 pc
  Some Tabulated XHIP Data for HD 100777
(see also: SIMBAD)

Astrometry
2007A&A...474..653V

Position	Proper Motion
Right Ascension:	173.96470644° ±0.76 mas	-9.40 ±1.00 mas/yr.
Declination:	-4.75577838° ±0.71 mas	32.60 ±1.10 mas/yr.
Galactic Longitude:	270.28538807°	-23.94 mas/yr.
Galactic Latitude:	53.25700661°	24.04 mas/yr.

Parallax: 20.16 ± 0.95 mas

Spectrography

Spectral Type: G8 V 1999MSS...C05....0H.

Radial Velocity: 1.24 ±0.00 km/s [A rating] 2007A&A...470..721N.

Iron Abundance [Fe/H]: 0.24 ±0.03 dex  2008A&A...487..373S.
 

Photometry
 

band	magnitude	Abs. Mag.
U
B	9.18	5.71
V	8.42	4.95
R
I	7.70	4.23
J	7.15	3.68
H	6.80	3.33
K	6.74	3.26

B-V: +0.76 V-I: +0.72

Derivations

Heliocentric distance: 49.47 pc (4.7% margin of error)

Galactocentric distance: 7,400 pc

Transverse velocity: 8.0 km/s

3D heliocentric position and motion:

toward:	Galactic center	Galactic rotation	North Galactic Pole
Position ( X, Y, Z)	0.1 pc	-29.6 pc	39.6 pc
Velocity (U, V, W)	-5.6 km/s	3.7 km/s	4.4 km/s