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Pi Andromedae information


Pi Andromedae
Diagram showing star positions and boundaries of the Andromeda constellation and its surroundings
Location of π Andromedae (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Andromeda
Right ascension 00h 36m 52.85132s[1]
Declination +33° 43′ 09.6363″[1]
Apparent magnitude (V) 4.36[2] (4.9/5.3)[3]
Characteristics
Spectral type B5 V[4] (B5 V + B5 V[3])
U−B color index –0.55[2]
B−V color index –0.16[2]
Astrometry
Radial velocity (Rv)+8.7[5] km/s
Proper motion (μ) RA: 14.669(118)[1] mas/yr
Dec.: −3.385(93)[1] mas/yr
Parallax (π)5.6563 ± 0.1474 mas[1]
Distance580 ± 20 ly
(177 ± 5 pc)
Orbit[3]
Period (P)143.6 days
Eccentricity (e)0.56
Details
Luminosity1,136[6] L
Surface gravity (log g)4.10[4] cgs
Temperature15,276[4] K
Metallicity [Fe/H]–0.20[4] dex
Rotational velocity (v sin i)25[7] km/s
Other designations
π Andromedae, 29 Andromedae, ADS 513, BD+32°101, FK5 18, HD 3369, HIP 2912, HR 154, SAO 54033, PPM 65480
Database references
SIMBADdata
π Andromedae in optical light

Pi Andromedae (Pi And, π Andromedae, π And) is the Bayer designation for a binary star[3] system in the northern constellation of Andromeda. With an apparent visual magnitude of 4.4,[2] it is visible to the naked eye. It is located approximately 580 light-years (180 parsecs) from Earth.[1]

The pair is classified as a blue-white B-type main sequence dwarf, with an apparent magnitude of +4.34. It is a spectroscopic binary with an orbital period of 143.6 days and an eccentricity of 0.56. [3]

The spectroscopic binary forms a triple system with BD+32 102, a magnitude 8.6 star located 35.9 arcseconds away.[3] At 55 arcseconds separation is an 11th magnitude companion that is just located on the same line of sight, but at a very different distance from us.

  1. ^ a b c d e f Cite error: The named reference Gaia EDR3 was invoked but never defined (see the help page).
  2. ^ a b c d Cite error: The named reference clpl4_99 was invoked but never defined (see the help page).
  3. ^ a b c d e f Cite error: The named reference mnras389_2_869 was invoked but never defined (see the help page).
  4. ^ a b c d Cite error: The named reference mnras374_2_664 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference gcrv was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference apj573_1_359 was invoked but never defined (see the help page).

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Pi Andromedae

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Pi Andromedae (Pi And, π Andromedae, π And) is the Bayer designation for a binary star system in the northern constellation of Andromeda. With an apparent...

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Main sequence

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Teff by the Stefan–Boltzmann law: L = 4 π σ R 2 T eff 4 {\displaystyle L=4\pi \sigma R^{2}T_{\text{eff}}^{4}} where σ is the Stefan–Boltzmann constant....

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Pi1 Cygni

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Cassiopeiae, 9 Lacertae, 3 Andromedae, 7 Andromedae, 8 Andromedae, Lambda Andromedae, Kappa Andromedae, Psi Andromedae and Iota Andromedae. Consequently, the...

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Pi2 Cygni

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Cassiopeiae, 9 Lacertae, 3 Andromedae, 7 Andromedae, 8 Andromedae, λ Andromedae, κ Andromedae, ψ Andromedae and ι Andromedae. Consequently, the Chinese...

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Omicron

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irregular function of both magnitude and position. Such stars include Omicron Andromedae, Omicron Ceti, and Omicron Persei. In Claudius Ptolemy's (c. 100–170)...

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Nakshatra

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27 Uttara Bhādrapada "the second of the blessed feet" γ Pegasi and α Andromedae Astrological leader: Shani (Saturn) Symbol: Twins, back legs of funeral...

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Doradus Binary star system 3.28 Delta Aquarii Star 3.28 Pi Hydrae Star 3.28 Delta Andromedae Binary star system 3.29 2.97 Mu Leporis Star 3.29 Iota Draconis...

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IAU designated constellations

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Origin Meaning Brightest star IAU NASA Andromeda /ænˈdrɒmɪdə/ And Andr Andromedae /ænˈdrɒmɪdiː/ ancient (Ptolemy) Andromeda (The chained maiden or princess)...

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inclination of their orbit is not known. Examples include HD 114762 b (>11.68 MJ), Pi Mensae b (>10.312 MJ), and NGC 2423-3 b (>10.6 MJ). Sorted by increasing right...

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Epsilon Indi

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(2001). "Modeling the Interstellar Medium-Stellar Wind Interactions of λ Andromedae and ε Indi". The Astrophysical Journal. 551 (1): 495–506. Bibcode:2001ApJ...

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Uemura †Salix alaskana †Salix albiformis †Salix amygdalifolia †Salix andromedae †Salix angusta †Salix angustifolia †Salix angustissima †Salix apollinis...

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Pi1 Gruis

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spectrograph made in 1895 to Paul W. Merrill and noting its similarity to R Andromedae. Merrill selected these two stars along with R Cygni to be the three prototypes...

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ZAND – (celestial object) Z ANDromedae, a class of eruptive variable stars named after the binary star system Z Andromedae, the archetype for the class...

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List of Chinese star names

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Western constellation Comments 軍南門 Jūn Nán Mén Southern Military Gate Phi Andromedae Andromeda A single-star asterism within the Legs mansion. 玄戈 Xuán Gē Sombre...

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List of smallest known stars

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R_{\odot }} . From : R = L 4 π σ T e 4 {\displaystyle R={\sqrt {\frac {L}{4\pi \sigma {T_{e}}^{4}}}}} , where L {\displaystyle L} is the luminosity, R {\displaystyle...

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line. 54 Piscium (HD 3651) HD 168443 Gliese 229 A Epsilon Indi A HD 82943 Pi Mensae HD 38529 HD 245134 Lists of exoplanets Methods of detecting exoplanets...

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List of interstellar and circumstellar molecules

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Ridgway, S. T. (2000), "Identification of SH v=1 Ro-vibrational Lines in R Andromedae", The Astrophysical Journal, 528 (1): L33–L36, arXiv:astro-ph/9911080...

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List of exoplanets detected by radial velocity

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612 0.5118 2012 HD 187123 c 1.989 3810.055 4.861 0.2523 1998 Upsilon Andromedae e 1.059 3848.859 5.204 0.0054 2010 HD 7449 c 2.002 4046.163 5.049 0.5344...

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