HD 211415

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HD 211415 A/B
Observation data Epoch J2000 Equinox J2000
Constellation	Grus
Right ascension	22^h 18^m 15.6152^s
Declination	–53° 37′ 37.465″
Apparent magnitude (V)	5.33
Characteristics
Spectral type	G1-3 V/M V
U−B color index	0.06
B−V color index	0.59
Variable type	None
Astrometry

Radial velocity (R_v)	-13.9 km/s
Proper motion (μ)	RA: 439.88 mas/yr Dec.: –632.60 mas/yr
Parallax (π)	73.47 ± 0.70 mas
Distance	44.4 ± 0.4 ly (13.6 ± 0.1 pc)
Absolute magnitude (M_V)	4.66

Details

Mass	1.0/0.5 M_☉
Radius	0.96/0.56 R_☉
Luminosity	1.09/0.018 L_☉
Temperature	5,925(A) K
Metallicity	49-54%(A) Sun
Rotation	?
Age	(2.6–4.1) × 10⁹^[1] years

Other designations
GJ 853 A, HR 8501, CD -54°9222, HD 211415, LHS 3790, LTT 8943, GCTP 5395.00, SAO 247400, LFT 1702, HIP 110109.

HD 211415 is a binary star system in the constellation Grus. It has a relatively high proper motion and is located about 44 light years from the Sun.

These two stars have an orbit with a semi-major axis of 3.4″, which is approximately equal to 46 astronomical units (au). This is larger than the orbit of Pluto around our Sun, which has a semi-major axis of 39.5 au. This system has not been observed for a sufficient length of time to establish the remaining orbital parameters with sufficient precision.

Possibility of planets and life

HD 211415 was identified in September 2003 by astrobiologist Margaret Turnbull from the University of Arizona in Tucson as one of the most promising nearby candidates for hosting life based on her analysis of the HabCat list of stars.^[2]

References

↑ Mamajek, Eric E.; Hillenbrand, Lynne A. (November 2008). "Improved Age Estimation for Solar-Type Dwarfs Using Activity-Rotation Diagnostics". The Astrophysical Journal 687 (2): 1264–1293. arXiv:0807.1686. Bibcode:2008ApJ...687.1264M. doi:10.1086/591785.
↑ "Astronomer Announces Shortlist Of Stellar Candidates For Habitable Worlds". Science Daily. 2006-02-21. Retrieved 2006-05-24.

External links

Spectra HD 211415
"HD 211415 -- High proper-motion Star". SIMBAD: Centre de Données astronomiques de Strasbourg. Retrieved 2006-06-08.
"HR 8501 / HD 211415 AB". SolStation. Retrieved 2006-06-08.
"4C01821". ARICNS. Retrieved 2006-06-08.
"Gliese 853 (HD 211415, HIP 110109)". The Encyclopedia of Astrobiology. Retrieved 2006-06-08.

← Star systems within 40–45 light-years →

Star systems (including brown dwarf systems) within 40–45 light-years from Earth.

Giant star

G III	Capella (42.2 ± 0.5 ly; 4 stars)

F
(Yellow-white)

IV	Beta Trianguli Australis (40.2 ± 0.3 ly; 2 stars) Theta Ursae Majoris «Alhaud» (44.0 ± 0.4 ly; 3 stars)

V	36 Ursae Majoris (41.9 ± 0.4 ly; 2 stars) Upsilon Andromedae (43.9 ± 0.4 ly; 2 stars, 4 planets: b c d e) 10 Tauri (44.8 ± 0.5 ly; 2 stars) Iota Piscium (45.0 ± 0.5 ly; 1 star)

G
(Yellow)

IV	Beta Aquilae «Alshain» (44.7 ± 0.5 ly; 2 stars)

V	Rho¹ (55) Cancri (40.9 ± 0.4 ly; 2 stars, 5 planets: e b c f d) HR 483 (41.2 ± 0.4 ly; 2 stars) Lambda Aurigae «Al Hurr» (41.2 ± 0.5 ly; 2 stars) HR 683 (41.4 ± 0.4 ly; 1 star) i (44) Boötis (41.6 ± 0.3 ly; 3 stars) HD 147513 (42.0 ± 0.5 ly; 2 stars, 1 planet: b) HR 6998 (42.4 ± 0.5 ly; 1 star) 58 Eridani (43.4 ± 0.5 ly; 1 star) HR 8501 (44.4 ± 0.4 ly; 2 stars)

K
(Orange)

IV	HR 4587 (42.1 ± 0.4 ly; 1 star) Gamma Cephei «Errai» (45.0 ± 0.3 ly; 2 stars, 1 planet: b)

V	Gliese 435 (40.8 ± 0.5 ly; 1 star) HD 69830 (41.0 ± 0.4 ly; 1 star, 3 planets: b c d) Gliese 142 (41.2 ± 1.2 ly; 1 star) Gliese 349 (41.4 ± 0.6 ly; 1 star) HD 158633 (41.7 ± 0.3 ly; 1 star) HD 40307 (41.8 ± 0.3 ly; 1 star, 6 planets: b c d e f g) Gliese 428 (42.0 ± 1.0 ly; 2 stars) HD 166348 (42.3 ± 0.7 ly; 1 star) Gliese 204 (42.3 ± 0.5 ly; 1 star) Gliese 167 (42.7 ± 0.3 ly; 1 star) HD 190007 (42.8 ± 0.6 ly; 1 star) SZ Crateris (42.9 ± 1.0 ly; 2 stars) HD 170657 (43.1 ± 0.5 ly; 1 star) Gliese 146 (43.6 ± 0.5 ly; 1 star) GJ 1267 (43.6 ± 0.8 ly; 1 star) Gliese 556 (43.8 ± 0.4 ly; 1 star) Gliese 69 (43.8 ± 0.7 ly; 1 star) HD 29697 (44.0 ± 0.8 ly; 1 star) Gliese 868 (44.2 ± 0.7 ly; 1 star) Gliese 528 (44.4 ± 0.7 ly; 2 stars) HD 154577 (44.6 ± 0.6 ly; 1 star) HD 166 (44.7 ± 0.5 ly; 2 stars) Gliese 615 (44.8 ± 0.5 ly; 1 star)

M V (Red dwarf)	Gliese 179 (40.1+2.1 −1.9 ly; 1 star, 1 planet: b) Gliese 806 (40.2 ± 0.9 ly; 1 star) GJ 4360 (40.8 ± 0.7 ly; 2 stars) HD 175224 (41.2 ± 1.6 ly; 2 stars) GJ 3707 (41.9 ± 1.3 ly; 1 star) Gliese 521 (42.4 ± 0.9 ly; 1 star) Gliese 215 (44.7 ± 0.7 ly; 1 star)

White
dwarf

DA	G 29-38 (44.4+2.6 −2.3 ly; 1 star)

DC	GRW +70 8247 (42.4+1.3 −1.2 ly; 1 star)

Brown
dwarf

T	WISE J0457-0207 (40.8* ± 10.1 ly; 1 brown dwarf)* WISE 1051-2138 (~40.8 ly; 1 brown dwarf) ULAS J0034-00 (41.0+2.1 −1.9 ly; 1 brown dwarf) WISE 1542+2230 (~41.1 ly; 1 brown dwarf) WISE 0857+5604 (~42.1 ly; 1 brown dwarf) WISE 2019-1148 (~42.4 ly; 1 brown dwarf) WISE 2134-7137 (~42.7 ly; 1 brown dwarf) WISE 2359-7335 (~42.7 ly; 1 brown dwarf) WISE 1311+0122 (~44.4 ly; 1 brown dwarf) WISE 1952+7240 (~44.4 ly; 1 brown dwarf) WISE 0513+0608 (~44.7 ly; 1 brown dwarf) WISE 2255-3118 (~44.7 ly; 1 brown dwarf) WISE 2226+0440 (~45.0 ly; 1 brown dwarf)

Y	WISE 1541-2250 (44.1+31.8 −13.0 ly; 1 brown dwarf)

In left column are stellar classes of primary members of star systems. Bold are systems containing at least one component with absolute magnitude of +8.5 or brighter. Italic are systems without known trigonometric parallax.

v t e Stars of Grus

Bayer	α (Alnair) β γ (Al Dhanab) δ¹ δ² ε ζ η θ ι κ λ μ¹ μ² ν ξ ο π¹ π² ρ σ¹ σ² τ¹ τ² τ³ υ φ

Variable	U W RS RZ BC BP BZ CE DL DQ

HR	8236 8241 8299 8323 8366 8379 8440 8477 8484 8501 8635 8639 8657 8658 8659 8685 8713 8749 8760 8771 8791 8793 8814 8835 8846 8847 8877 8896 8898

HD	208487 213240 215456

Gliese	Gliese 832 GJ 4248

Other	WASP-95 WISE 2220-3628

List

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