Grafias, a blue supergiant star in Scorpius
Grafias is a blue supergiant star in the constellation Scorpius. At 2,453 light years away, it shines at an apparent visual magnitude of 4.7.
Grafias (HIP 82671)
Grafias is a blue supergiant star in the constellation Scorpius. At 2,453 light years away, it shines at an apparent visual magnitude of 4.70. It is moving through the Galaxy at a speed of 29.7 km/s relative to the Sun. Its projected Galactic orbit carries it between 20,900 and 22,400 light years from the center of the Galaxy.
Sky position: RA 16h 54.0m, Dec -42° 21.6'
Common designations: Grafias, Zeta-1 Scorpii, HIP 82671, HD 152236, HR 6262
Brightest stars in Scorpius:
(list all)
| Rank | Mag. | Star |
| 20 | 4.00 | Jabbah |
| 21 | 4.18 | H Scorpii |
| 22 | 4.24 | N Scorpii |
| 23 | 4.26 | Q Scorpii |
| 24 | 4.31 | Omega-2 Scorpii |
| 25 | 4.55 | Omicron Scorpii |
| 26 | 4.58 | 13 Scorpii |
| 27 | 4.59 | A Scorpii |
| 28 | 4.63 | 1 Scorpii |
29
| 4.70
) Grafias
| Rank | Mag. | Star |
| 30 | 4.78 | Iota-2 Scorpii |
| 31 | 4.79 | 22 Scorpii |
| 32 | 4.79 | HR 6628 |
| 33 | 4.80 | d Scorpii |
| 34 | 4.83 | k Scorpii |
| 35 | 4.85 | HR 6675 |
| 36 | 4.88 | HR 6682 |
Hover over other bright stars to identify or click to jump.
Galactic Orbit of Grafias
(compared to the Sun)
E
ccentricity: 3.5% vs. 16.0%Angle φ : -104.1°vs. 26.0°
Semi-major axis : 6,635 pc vs. 8,686 pc
Semi-minor axis: 6,631 pc vs. 8,574 pc
Focus-to-center
: 232 pcvs. 1,388 pcSemilatus rectum : 6,627 pc vs. 8,464 pc
Perigalacticon: 6,403 pc vs. 7,297 pc
Apogalacticon
: 6,867 pcvs. 10,074 pcSome Tabulated XHIP Data for Grafias
(see also: SIMBAD)
Astrometry
2007A&A...474..653V
| Position | Proper Motion | |
| Right Ascension: | 253.49886374° ±0.22 mas | -0.91 ±0.25 mas/yr. |
| Declination: | -42.36201977° ±0.18 mas | -3.93 ±0.19 mas/yr. |
| Galactic Longitude: | 343.02754302° | -3.62 mas/yr. |
| Galactic Latitude: | 0.86999402° | -1.78 mas/yr. |
Parallax: 1.27 ± 0.25 mas
Spectrography
Spectral Type: B1/2 IA 1978MSS...C02....0H.
Radial Velocity: -26.00 ±0.80 km/s [A rating] 2006AstL...32..759G.
Iron Abundance [Fe/H]:
n/a
Photometry
band
magnitude
Abs. Mag.
U
4.61
-4.77
B
5.14
-4.24
V
4.70
-4.68
R
I
4.11
-5.28
J
3.59
-5.79
H
3.34
-6.04
K
3.22
-6.17
B-V: +0.44 V-I: +0.59
Derivations
Heliocentric distance: 752.41 pc (19.7% margin of error)
Galactocentric distance: 6,684 pc
Transverse velocity: 14.4 km/s
3D heliocentric position and motion:
|
toward: |
Galactic center | Galactic rotation | North Galactic Pole |
| Position ( X, Y, Z) | 719.6 pc | -219.6 pc | 11.4 pc |
| Velocity (U, V, W) | -28.5 km/s | -4.8 km/s | -6.7 km/s |