Delta Reticuli

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Delta Reticuli
Reticulum IAU.svg
Cercle rouge 100%25.svg
Location of δ Reticuli (circled)
Observation data
Epoch J2000.0        Equinox J2000.0 (ICRS)
Constellation Reticulum
Right ascension 03h 58m 44.74945s [1]
Declination −61° 24 00.6673 [1]
Apparent magnitude  (V)4.60 [2]
Characteristics
Evolutionary stage asymptotic giant branch [3]
Spectral type M2 III [4]
U−B color index +2.02 [2]
B−V color index +1.61 [2]
Variable type Suspected [5]
Astrometry
Radial velocity (Rv)−1.4±2.8 [6]  km/s
Proper motion (μ)RA: +9.80 [1]   mas/yr
Dec.: −14.30 [1]   mas/yr
Parallax (π)6.20 ± 0.25  mas [1]
Distance 530 ± 20  ly
(161 ± 7  pc)
Absolute magnitude  (MV)−1.47 [7]
Details
Radius 56 [8]   R
Luminosity 1,100 [9]   L
Temperature 3,891 [9]   K
Other designations
δ Ret, CPD−61 290, FK5  1110, HD  25422, HIP  18597, HR  1247, SAO  248918. [10]
Database references
SIMBAD data

Delta Reticuli (Delta Ret, δ Reticuli, δ Ret) is a star in the southern constellation of Reticulum. It is visible to the naked eye, having an apparent visual magnitude of 4.60. [2] The distance to this star, as estimated from its annual parallax shift of 6.20  mas, [1] is roughly 530  light-years from the Sun.

This is an evolved red giant star on the asymptotic giant branch, [3] having a stellar classification of M2 III. [4] It has expanded to around 56 [8] times the radius of the Sun and radiates 1,100 times the solar luminosity from its cool outer atmosphere at an effective temperature of 3,891 K. [9]

Delta Reticuli is moving through the Milky Way at a speed of 13.3 km/s relative to the Sun. Its projected galactic orbit carries it between 22,700 and 30,400 light-years from the center of the galaxy. [11]

Related Research Articles

Chi<sup>3</sup> Sagittarii Star in the constellation Sagittarius

Chi3 Sagittarii (χ3 Sagittarii) is a solitary, orange-hued star in the zodiac constellation of Sagittarius. It is faintly visible to the naked eye with an apparent visual magnitude of +5.45. Based upon an annual parallax shift of 6.53 mas as seen from Earth, it is located roughly 500 light years from the Sun. It is receding from the Earth with a radial velocity of 39.6 km/s.

Omicron Serpentis is a solitary star in the Serpens Cauda (tail) section of the equatorial constellation Serpens. Based upon an annual parallax shift of 18.83 mas as seen from Earth, it is located around 173 light years from the Sun. The star is visible to the naked eye with a base apparent visual magnitude of +4.26.

Kappa2 Sculptoris, Latinized from κ2 Sculptoris, is a solitary, orange-hued star in the southern constellation of Sculptor. It is faintly visible to the naked eye, with a combined apparent visual magnitude of +5.42. Based upon an annual parallax shift of 4.11 mas as measured from Earth, it is located approximately 800 light years from the Sun.

Delta Sextantis is a solitary star in the equatorial constellation of Sextans. With an annual parallax shift of 10.13 mas, it lies at a distance of around 322 light years from the Sun. This star is faintly visible to the naked eye, having an apparent visual magnitude of +5.25. According to the Bortle scale, that means it can be viewed from dark suburban skies.

Omega2 Cygni, Latinized from ω2 Cygni, is the Bayer designation for a solitary star in the northern constellation of Cygnus. It has an apparent visual magnitude of 5.5, which is faintly visible to the naked eye on a dark night. Based upon an annual parallax shift of 8.17 mas, it is located roughly 399 light years from the Sun. At that distance, the visual magnitude is diminished by an extinction factor of 0.08 due to interstellar dust.

<span class="mw-page-title-main">Delta Volantis</span> Solitary star in the constellation Volans

Delta Volantis, Latinized from δ Volantis, is a solitary star in the southern constellation Volans. It has an apparent visual magnitude of +3.97, which is bright enough to be seen with the naked eye. Based upon parallax measurements, is approximately 740 light years from the Sun.

Delta<sup>1</sup> Canis Minoris Star in the constellation Canis Minor

Delta1 Canis Minoris, Latinized from δ1 Canis Minoris, is a solitary, yellow-white hued star in the constellation Canis Minor. It is faintly visible to the naked eye with an apparent visual magnitude of +5.25. Based upon an annual parallax shift of 4.29 mas as seen from Earth, this star is located roughly 760 light years from the Sun.

Zeta Caeli, Latinized from ζ Caeli, is an orange-hued star in the constellation Caelum with a visual magnitude of +6.36. It is an evolved K-type giant star and a member of the Milky Way's thick disk population. Based upon an annual parallax shift of 7.59 mas as seen from Earth, this star is located about 430 light years from the Sun.

δ Doradus is a star in the southern constellation of Dorado. Based upon an annual parallax shift of 21.80 mas as seen from Earth, it is located around 150 light years from the Sun. The star is visible to the naked eye with an apparent visual magnitude of +4.34.

<span class="mw-page-title-main">101 Virginis</span> Star in the constellation Boötes

101 Virginis is a red giant variable star in the Boötes constellation, currently on the asymptotic giant branch. It was originally catalogued as 101 Virginis by Flamsteed due to an error in the position. When it was confirmed as a variable star, it was actually within the border of the constellation Boötes and given the name CY Boötis.

<span class="mw-page-title-main">Beta Reticuli</span> Star in the constellation Reticulum

Beta Reticuli is binary star system in southern constellation of Reticulum. It is visible to the naked eye with an apparent visual magnitude of +3.84. Based upon an annual parallax shift of 33.49 mas, it is located some 97 light years from our Sun.

<span class="mw-page-title-main">Gamma Reticuli</span> Variable star in the constellation Reticulum

Gamma Reticuli is a solitary star in the southern constellation of Reticulum. With an apparent visual magnitude of 4.5, it can be faintly seen with the naked eye. Based upon an annual parallax shift of 6.95 mas, it is located roughly 469 light years from the Sun. At that distance, the visual magnitude is diminished by an extinction factor of 0.08 due to interstellar dust.

<span class="mw-page-title-main">Eta Reticuli</span> Star in the constellation Reticulum

Eta Reticuli, Latinized from η Reticuli, is a solitary star in the southern constellation of Reticulum. With an apparent visual magnitude of 5.22, it is faintly visible to the naked eye on a dark night. Based upon an annual parallax shift of 8.48 mas, it is located at a distance of roughly 385 light years from the Sun. It may be a member of the high-velocity Zeta Herculis Moving Group of stars that share a common motion through space.

<span class="mw-page-title-main">Iota Reticuli</span> Star in the constellation Reticulum

ι Reticuli, Latinized as Iota Reticuli, is a solitary, orange-hued star in the southern constellation of Reticulum. It is faintly visible to the naked eye, having a combined apparent visual magnitude of +4.97. Based upon an annual parallax shift of 10.22 mas as seen from Earth, it is located around 319 light years from the Sun. At present it is receding from the Sun with a radial velocity of +61 km/s, having come closest to the Sun 883,000 years ago at a distance of 212 light years. Iota Reticuli 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.

<span class="mw-page-title-main">7 Ceti</span> Star in the constellation Cetus

7 Ceti is a single, variable star in the equatorial constellation of Cetus. It has the variable star designation AE Ceti. The star is visible to the naked eye with a baseline apparent visual magnitude of 4.44. Based upon an annual parallax shift of only 7.3 mas, it is located roughly 450 light years away. It is moving closer to the Sun with a heliocentric radial velocity of −23 km/s. Eggen (1965) listed it as a probable member of the Wolf 630 group of co-moving stars.

<span class="mw-page-title-main">Epsilon Crateris</span> Solitary star in the constellation Crater

Epsilon Crateris is a solitary star in the southern constellation of Crater. Visible to the naked eye, it has an apparent visual magnitude of 4.84. It is located in the sky above Beta Crateris, and slightly to the left, or east, marking the lower right edge of the rim of the bowl and is somewhat closer to Theta Crateris, which is further east at the top of the bowl. With an annual parallax shift of 8.67 mas as seen from the Earth, its estimated distance is around 376 light years from the Sun.

Pi Eridani, Latinized from π Eridani, is a star in the constellation Eridanus. It has an apparent visual magnitude of 4.40, which is bright enough to be seen on a dark, clear night. Based upon parallax measurements, it is located roughly 480 light years from the Sun.

Phi2 Hydrae, Latinized from φ2 Hydrae, is a star in the constellation Hydra. It originally received the Flamsteed designation of 1 Crateris before being placed in the Hydra constellation. Based upon an annual parallax shift of 4.31 mas as seen from Earth, it is located roughly 760 light years from the Sun. The star is faintly visible to the naked with an apparent visual magnitude of 6.09. It forms a triangle with the fainter φ1 Hydrae and the brighter φ3 Hydrae, between μ Hydrae and ν Hydrae.

Mu Coronae Borealis, Latinized from μ Coronae Borealis, is a solitary, ruby-hued star located in the northern constellation of Corona Borealis. It is faintly visible to the naked eye, having an apparent visual magnitude of 5.12. Based upon an annual parallax shift of 5.27 mas, it is located roughly 620 light years from the Sun. This is an evolved red giant star with a stellar classification of M1.5 IIIb. It is currently on the asymptotic giant branch and is a variable star of uncertain type, showing a change in brightness with an amplitude of 0.0147 magnitude and a frequency of 0.02455 cycles per day, or 40.7 days/cycle. On average, it is radiating 932 times the Sun's luminosity from its enlarged photosphere at an effective temperature of 3,889 K.

Delta Normae, Latinised from δ Normae, is a star system in the southern constellation of Norma. It is visible to the naked eye with an apparent visual magnitude of 4.74. Based upon an annual parallax shift of 26.66 mas as seen from Earth, the system is located about 122 light-years distant from the Sun.

References

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  10. "del Ret". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved 2017-02-14.{{cite web}}: CS1 maint: postscript (link)
  11. "Delta Reticuli (HIP 18597)". Archived from the original on 2014-04-14. Retrieved 2012-08-17.