Iota Reticuli (HIP 18772)

Iota Reticuli is an orange giant star in the constellation Reticulum. At 319 light years away, it shines at an apparent visual magnitude of 4.97. It is moving through the Galaxy at a speed of 80.9 km/s relative to the Sun. Its projected Galactic orbit carries it between 12,300 and 25,100 light years from the center of the Galaxy. It came closest to the Sun 883,000 years ago when it had brightened to magnitude 4.08 from a distance of 212 light years.

Sky position: RA 4h 1.3m, Dec -61° 4.8'

Common designations: Iota Reticuli, HIP 18772, HD 25728

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Brightest stars in Reticulum:
(list all)

1

|    3.33

)   Alpha Reticuli

2

|    3.84

)   Beta Reticuli

3

|    4.44

)   Epsilon Reticuli

4

|    4.48

)   Gamma Reticuli

5

|    4.56

)   Delta Reticuli

6

|    4.71

)   Kappa Reticuli

7

|    4.97

)   Iota Reticuli

8

|    5.24

)   Zeta-2 Reticuli

9

|    5.24

)   Eta Reticuli

10

|    5.45

)   HR 1340

11

|    5.53

)   Zeta-1 Reticuli

12

|    5.74

)   HR 1435

13

|    5.79

)   HR 1475

14

|    5.81

)   HR 1092

15

|    5.88

)   Theta Reticuli

16

|    5.94

)   HR 1416

17

|    6.03

)   HR 1014


Galactic Orbit of Iota Reticuli
(compared to the Sun)

Eccentricity: 34.4% vs. 16.0%

Angle φ : -156.7° vs. 26.0°

Semi-major axis : 5,738 pc vs. 8,686 pc

Semi-minor axis: 5,387 pc vs. 8,574 pc

Focus-to-center: 1,974 pc vs. 1,388 pc

Semilatus rectum : 5,058 pc vs. 8,464 pc

Perigalacticon: 3,764 pc vs. 7,297 pc

Apogalacticon: 7,711 pc vs. 10,074 pc
 
Some Tabulated XHIP Data for Iota Reticuli
(see also: SIMBAD)

Astrometry
 2007A&A...474..653V
  Position Proper Motion
Right Ascension: 60.32529607° ±0.15 mas 66.76 ±0.15 mas/yr.
Declination: -61.07905151° ±0.15 mas 94.80 ±0.17 mas/yr.
     
Galactic Longitude: 273.43454142° -114.14 mas/yr.
Galactic Latitude: -43.63648906° 20.40 mas/yr.

Parallax: 10.22 ± 0.16 mas

Spectrography

Spectral Type: K4III 1975MSS...C01....0H.

Radial Velocity: 60.50 ±0.80 km/s [A rating] 2006AstL...32..759G.

Iron Abundance [Fe/H]: n/a
 


Photometry
 
band magnitude Abs. Mag.
U
B 6.36 1.40
V 4.97 0.02
R
I 3.72 -1.24
J 2.57 -2.38
H 1.90 -3.05
K 1.75 -3.21

  B-V: +1.39       V-I: +1.25

Derivations

Heliocentric distance: 97.82 pc (1.6% margin of error)

Galactocentric distance: 7,396 pc

Transverse velocity: 53.8 km/s

3D heliocentric position and motion:

toward:   

Galactic center Galactic rotation North Galactic Pole
Position ( X, Y, Z) 4.2 pc -70.7 pc -67.5 pc
Velocity (U, V, W) -49.8 km/s -53.4 km/s -34.9 km/s

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