73 Leonis (HIP 55016)

73 Leonis is an orange giant star in the constellation Leo. At 383 light years away, it shines at an apparent visual magnitude of 5.31. 73 Leonis is a component of a multiple-star system. The iron abundance of 73 Leonis is -0.05 (89.1% of the Sun). It is moving through the Galaxy at a speed of 16 km/s relative to the Sun.

Sky position: RA 11h 15.9m, Dec +13 18.6'

Common designations: n Leonis, 73 Leonis, HIP 55016, HD 97907

Beautiful & Sophisticated!

2014 Moon Calendar
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Brightest stars in Leo:
(list all)

30

|    4.98

)   59 Leonis

31

|    4.99

)   Xi Leonis

32

|    5.00

)   10 Leonis

33

|    5.07

)   6 Leonis

34

|    5.07

)   48 Leonis

35

|    5.18

)   75 Leonis

36

|    5.26

)   Nu Leonis

37

|    5.26

)   92 Leonis

38

|    5.29

)   22 Leonis

39

|    5.31

)   73 Leonis

40

|    5.32

)   53 Leonis

41

|    5.36

)   Psi Leonis

42

|    5.39

)   79 Leonis

43

|    5.40

)   Omega Leonis

44

|    5.40

)   69 Leonis

45

|    5.42

)   37 Leonis

46

|    5.43

)   46 Leonis

Location of 73 Leonis circled
Map detail from Stars of the Northern Hemisphere
Hover over other bright stars to identify or click to jump.


Galactic Orbit of 73 Leonis

(compared to the Sun)

Eccentricity: 7.0% vs. 16.0%

Angle φ : 56.4 vs. 26.0

Semi-major axis : 7,755 pc vs. 8,686 pc

Semi-minor axis: 7,736 pc vs. 8,574 pc

Focus-to-center: 546 pc vs. 1,388 pc

Semilatus rectum : 7,716 pc vs. 8,464 pc

Perigalacticon: 7,209 pc vs. 7,297 pc

Apogalacticon: 8,300 pc vs. 10,074 pc
 


Some Tabulated XHIP Data for 73 Leonis
(see also: SIMBAD)

Astrometry
2007A&A...474..653V
  Position Proper Motion
Right Ascension: 168.96623717 0.63 mas -4.40 0.60 mas/yr.
Declination: 13.30759305 0.47 mas -10.60 0.60 mas/yr.
     
Galactic Longitude: 239.93449591 6.09 mas/yr.
Galactic Latitude: 63.74391486 -9.73 mas/yr.

Parallax: 8.44 0.71 mas


Spectrography

Spectral Type: K2III 1989ApJS...71..245K.

Radial Velocity: 14.64 0.30 km/s [A rating] 2005A&A...430..165F.
This star is a spectroscopic binary with a solved orbit.

Iron Abundance [Fe/H]: -0.05 0.04 dex  2011A&A...525A..71W.
 



Photometry
 
band magnitude Abs. Mag.
U
B 6.50 1.15
V 5.31 -0.04
R
I 4.25 -1.10
J 3.25 -2.10
H 2.66 -2.69
K 2.44 -2.91

  B-V: +1.19       V-I: +1.06


Derivations

Heliocentric distance: 117.49 pc (8.4% margin of error)

Galactocentric distance: 7,427 pc

Transverse velocity: 6.4 km/s

3D heliocentric position and motion:

toward:   

Galactic center Galactic rotation North Galactic Pole
Position ( X, Y, Z) -26.0 pc -45.0 pc 105.4 pc
Velocity (U, V, W) -2.7 km/s -11.5 km/s 10.7 km/s

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