Gliese 784, a red dwarf star in Telescopium

Gliese 784 (HIP 99701)

Gliese 784 is a red dwarf star in the constellation Telescopium. At 20.2 light years away, it shines at an apparent visual magnitude of 7.97. It is moving through the Galaxy at a speed of 42.2 km/s relative to the Sun. Its projected Galactic orbit carries it between 23,000 and 35,800 light years from the center of the Galaxy. It will come closest to the Sun 120,000 years from now when it will brighten to magnitude 6.69 from a distance of 11.2 light years.

Sky position: RA 20h 13.9m, Dec -45° 9.6'

Common designations: HIP 99701, HD 191849, Gliese 784

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Galactic Orbit of Gliese 784
(compared to the Sun)

E

ccentricity: 21.7% vs. 16.0%

Angle φ : -41.9°vs. 26.0°

Semi-major axis : 9,014 pc vs. 8,686 pc

Semi-minor axis: 8,799 pc vs. 8,574 pc

Focus-to-center

: 1,956 pcvs. 1,388 pc

Semilatus rectum : 8,589 pc vs. 8,464 pc

Perigalacticon: 7,058 pc vs. 7,297 pc

Apogalacticon

: 10,970 pcvs. 10,074 pc
  Some Tabulated XHIP Data for Gliese 784
(see also: SIMBAD)

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

Position	Proper Motion
Right Ascension:	303.46980231° ±0.89 mas	778.60 ±1.00 mas/yr.
Declination:	-45.16363150° ±0.59 mas	-159.53 ±0.79 mas/yr.
Galactic Longitude:	354.80689378°	-66.20 mas/yr.
Galactic Latitude:	-32.97281762°	-792.01 mas/yr.

Parallax: 161.34 ± 1.00 mas

Spectrography

Spectral Type: M0V 2006A&A...460..695T.

Radial Velocity: -35.10 ±0.20 km/s [A rating] 2006AstL...32..759G.

Iron Abundance [Fe/H]: n/a

Photometry
 

band	magnitude	Abs. Mag.
U
B	9.40	10.44
V	7.97	9.01
R
I	6.14	7.18
J	5.12	6.16
H	4.53	5.56
K	4.28	5.32

B-V: +1.43 V-I: +1.83

Derivations

Heliocentric distance: 6.20 pc (0.6% margin of error)

Galactocentric distance: 7,395 pc

Transverse velocity: 23.4 km/s

3D heliocentric position and motion:

toward:	Galactic center	Galactic rotation	North Galactic Pole
Position ( X, Y, Z)	5.2 pc	-0.5 pc	-3.4 pc
Velocity (U, V, W)	-42.1 km/s	1.9 km/s	-0.4 km/s