Psi Serpentis

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ψ Serpentis
Observation data Epoch J2000 Equinox J2000
Constellation	Serpens
Right ascension	15^h 44^m 01.821^s^[1]
Declination	+02° 30′ 54.63″^[1]
Apparent magnitude (V)	5.879
Characteristics
Spectral type	ACE: G5V + K2 + G8III
U−B color index	0.25
B−V color index	0.67
Variable type	?
Astrometry

Radial velocity (R_v)	+14 km/s
Proper motion (μ)	RA: -43.11 ± 0.79^[1] mas/yr Dec.: -143.57 ± 0.56^[1] mas/yr
Parallax (π)	68.22 ± 0.66^[1] mas
Distance	47.8 ± 0.5 ly (14.7 ± 0.1 pc)
Absolute magnitude (M_V)	5.05

Details

Age	3.2 × 10⁹^[2] years

Other designations
23 Serpentis, HR 5853, HD 140538 + HD 140527 + HD 140489, SAO 121152, HIP 77052 + HIP 77043 + HIP 77034, ADS 9763, CCDM 15439+0230

Psi Serpentis (ψ Ser, ψ Serpentis) is a star system in the constellation Serpens. It is approximately 47.8 light years from Earth.

The primary component, Psi Serpentis A, is a yellow G-type main sequence dwarf with an apparent magnitude of +5.86. It has a close 12th magnitude companion, Psi Serpentis B, 4.2 arcseconds, or at least 60 AUs, distant.

When observed from 1997 through 2000, the primary star appeared to be transitioning from a maunder minimum state to a state of cycling magnetic activity.^[3]

References

↑ 1.0 1.1 1.2 1.3 1.4 van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. Vizier catalog entry
↑ 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.
↑ Hall, Jeffrey C.; Lockwood, G. W.; Skiff, Brian A. (March 2007), "The Activity and Variability of the Sun and Sun-like Stars. I. Synoptic Ca II H and K Observations", The Astronomical Journal 133 (3): 862–881, Bibcode:2007AJ....133..862H, doi:10.1086/510356

External links

← Star systems within 45–50 light-years →

Star systems (including brown dwarf systems) within 45–50 light-years from Earth.

A
(White)

IV	Alpha Cephei «Alderamin» (48.8 ± 0.4 ly; 1 star)

V	Iota Ursae Majoris «Talitha Borealis» (47.7 ± 0.6 ly; 4 stars)

F V
(Yellow-white)

Tau¹ Eridani (45.6 ± 0.5 ly; 2 stars)
Alpha Fornacis «Dalim» (46.0 ± 0.4 ly; 2 stars)
Theta Boötis «Asellus Primus» (47.5 ± 0.4 ly; 2 stars)
111 Tauri (Gliese 201/202) (47.8 ± 0.7 ly; 2 stars)
Psi Capricorni «Yue» (47.9 ± 0.6 ly; 1 star)
Alpha Corvi «Alchiba» (48.2 ± 0.5 ly; 1 star)
HR 3862 (49.0 ± 0.2 ly; 1 star)
Eta Leporis (49.1 ± 0.5 ly; 1 star)
Nu Phoenicis (49.1 ± 0.5 ly; 1 star)
19 Draconis (49.2 ± 0.4 ly; 2 stars)

G
(Yellow)

IV	b (31) Aquilae (49.4 ± 0.6 ly; 3 stars)

V	18 Scorpii (45.7 ± 0.6 ly; 1 star) 47 Ursae Majoris (45.9 ± 0.4 ly; 1 star, 3 planets: b c d) 26 Draconis (45.9 ± 0.3 ly; 3 stars) Pi¹ Ursae Majoris (46.6 ± 0.5 ly; 1 star) Gliese 611 (46.9 ± 0.4 ly; 2 stars) 72 Herculis (46.9 ± 0.4 ly; 1 star) Nu² Lupi (47.5 ± 0.5 ly; 1 star, 3 planets: b c d) HR 7898 (47.8 ± 0.6 ly; 1 star) Psi Serpentis (47.9 ± 0.6 ly; 2 stars) 20 Leonis Minoris «Cor» (48.6 ± 0.6 ly; 1 star) HR 209 (48.7 ± 0.5 ly; 2 stars) HD 176051 (48.9 ± 0.4 ly; 2 stars, 1 planet: b) 171 G. Puppis (49.6 ± 0.4 ly; 2 stars) HR 5864 (49.7 ± 0.6 ly; 2 stars) Mu Arae (49.8 ± 0.6 ly; 1 star, 4 planets: d e b c)

K
(Orange)

IV	Eta Cephei «Al Agemim» (46.8 ± 0.3 ly; 1 star)

V	Gliese 898/897 (45.5 ± 0.9 ly; 4 stars) Gliese 532 (45.7 ± 0.6 ly; 1 star) HD 23356 (45.8 ± 0.6 ly; 1 star) Gliese 42 (45.9 ± 0.5 ly; 1 star) Gliese 726 (46.1 ± 0.8 ly; 1 star) Gliese 529 (46.3 ± 0.7 ly; 1 star) Gliese 282 (46.3 ± 0.6 ly; 2 stars) HR 7578 (46.4 ± 0.5 ly; 2 stars) Gliese 481 (46.6 ± 0.7 ly; 1 star) Gliese 613 (46.8 ± 0.6 ly; 1 star) HD 150689 (46.9 ± 0.7 ly; 1 star) Gliese 546 (47.0 ± 0.7 ly; 1 star) Gliese 259 (47.7 ± 0.5 ly; 1 star) OU Geminorum (47.8 ± 0.8 ly; 2 stars) Gliese 604 (47.8 ± 0.7 ly; 1 star) Gliese 420 (47.9 ± 0.8 ly; 2 stars) Gliese 833 (48.1 ± 0.6 ly; 1 star) Gliese 269 (48.2 ± 0.6 ly; 2 stars) Gliese 818 (48.4 ± 1.0 ly; 1 star) AB Doradus (48.7 ± 0.4 ly; 2 stars) Gliese 14 (48.9 ± 0.8 ly; 1 star) Gliese 52 (49.1 ± 0.9 ly; 1 star) Gliese 483 (49.1 ± 0.6 ly; 1 star) GJ 1279 (49.2 ± 0.7 ly; 1 star) Gliese 141 (49.3 ± 0.7 ly; 1 star) Gliese 40 (49.6 ± 1.1 ly; 2 stars)

M V (Red dwarf)	Gliese 400 (46.0 ± 1.6 ly; 2 stars) HIP 79431 (47.0+2.2 −2.0 ly; 1 star, 1 planet: b) CM Draconis (47.1 ± 1.8 ly; 2 stars, 0 (1?) planets: b?) GJ 1214 (47.5 ± 0.4 ly; 1 star, 1 planet: b) Gliese 123 (48.8 ± 1.3 ly; 1 star) Gliese 163 (48.9+1.4 −1.3 ly; 1 star, 3 (5?) planets: b e? c f? d) Gliese 317 (49.9 ± 0.4 ly; 1 star, 2 planets: b c)

Brown
dwarf

L	WISEP J004701.06+680352.1 (48.9* ± 16.3 ly; 1 brown dwarf)*

T	WISE 0323-6025 (~45.3 ly; 1 brown dwarf) WISE 0335+4310 (~45.7 ly; 1 brown dwarf) WISE 0723+3403 (~45.7 ly; 1 brown dwarf) WISE 0819-0335 (~46.0 ly; 1 brown dwarf) WISE 2209-2734 (~46.0 ly; 1 brown dwarf) WISE 2237+7228 (~46.0 ly; 1 brown dwarf) WISE 2344+1034 (~46.0 ly; 1 brown dwarf) WISE 0458+6434 (46.6+17.4 −9.9 ly; 2 brown dwarfs) WISE 0223-2932 (~47.0 ly; 1 brown dwarf) WISE 0500-1223 (~47.0 ly; 1 brown dwarf) WISE 1812+2721 (~47.0 ly; 1 brown dwarf) VHS J125804.89-441232.4 (47.1* ± 5.9 ly; 1 brown dwarf)* WISEPA J074457.15+562821.8 (~47.3 ly; 1 brown dwarf) WISE 1309-1600 (~47.3 ly; 1 brown dwarf) WISE 0040+0900 (~47.6 ly; 1 brown dwarf) WISE 1018-2445 (~47.6 ly; 1 brown dwarf) WISE 2018-7423 (~47.9 ly; 1 brown dwarf) WISE 0015-4615 (~48.6 ly; 1 brown dwarf) WISE 2343-7418 (~48.6 ly; 1 brown dwarf)

Free-floating
planet

Y	WISE 1828+2650 (46.6+11.6 −7.8 ly; 1 (2?) planets)

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 Serpens

Bayer	α (Unukalhai) β (Chow) γ δ (Tsin) ε ζ η (Tang) θ (Alya) ι κ λ μ ν ξ ο π ρ σ τ¹ τ² τ³ τ⁴ τ⁵ τ⁶ τ⁷ τ⁸ υ φ χ ψ ω

Flamsteed	3 4 5 6 7 8 10 11 14 16 25 29 36 39 40 43 45 46 47 59 60 61 64

Variable	R W X RT UZ VV VY WX AA AN AO AP AR AU BQ CT CV CW EG FH FI FK FL FQ FR LV LW LX MR MS MT MV MY NN NO NQ NW OO OU PS QV QX QY V382 V411

HR	5665 5690 5692 5706 5711 5740 5745 5783 5796 5831 5850 5859 5861 5874 5909 5913 5931 5963 5992 6005 6011 6014 6016 6449 6496 6544 6562 6568 6600 6620 6666 6681 6755 6756 6757 6785 6830 6840 6843 6858 6890 6898 6928 6993 6999 7008 7048 7076 7144

HD	135061 135615 136027 136118 138085 142245 143436 145936 146740 157969 168112 168443 168746 175541

Gliese	Gliese 701 Gliese 710 GJ 1224

Other	ADS 9544 AS 296 COROT-9 COROT-11 COROT-23 GX 17+2 MWC 297 PG 1510+234 PG 1605+072 PSR B1534+11 PSR J1719-1438 Serpens SVS 20 Serpens X-1

List

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