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Rho2 Cephei

star in the constellation Cepheus
Star Q310540

Facts

18 properties

Identity

Instance of
star, infrared source, near-infrared source, ultraviolet source[1][2][3]
More facts +17
Absolute magnitude
1.07[29]
Age estimated by a dating method
85 megaannum[52]
Apparent magnitude
5.44 (5.23–5.62, n=7)[22][23][24][25][26][27][28]
Catalog code
IRAS 22294+7833, 2MASS J22295298+7849276, SAO 10402, GSC 04608-02417, HD 213798, HIP 111056, HR 8591, BD+78 801, FK5 1593, GC 31474, GCRV 14156, HIC 111056, N30 4964, PLX 5456, PLX 5456.00, PMC 90-93 1130, PPM 11249, ROT 3283, TD1 29176, TYC 4608-2417-1, Gaia DR1 2285649894054051584, WEB 19881, Gaia DR2 2285649898351302656, ρ² Cep, 29 Cep, Gaia DR3 2285649898351302656, TIC 470196152, AG+78 538[8][9][10][11][12][13][14][15][16][17][18][19][20][21]
Constellation
Cepheus[4]
Declination
78.82428667572°[49]
Declination component of proper motion
-20.8 (-21.7–-5, n=7)[53][54][55][56][57][58][59]
Distance from Earth
73.6073 parsec, 73.509 parsec[44][45]
Effective temperature
8,511 K[51]
Epoch
J2000.0[50]
Parallax
13.6 (5.9–13.8, n=6)[31][32][33][34][35][36]
Radial velocity
7.6 (-18–14, n=8)[37][38][39][40][41][42][43]
Radius
2.61 solar radius[30]
Right ascension
337.47074152159°[48]
Right ascension component of proper motion
3.54 (-1–29, n=7)[60][61][62]
Spectral class
A3V, A0V, A2[5][6][7]
Stellar rotational velocity
133 km/s, 120 km/s[46][47]
🏷️ Also known as
en ρ2 Cephei en ρ Cephei en ρ Cep en 29 Cep en 29 Cephei en Al Kalb al Rāi en GCRV 14156 en HD 213798 en HIC 111056 en HIP 111056 en HR 8591 en Rho2 Cephei en Rho Cephei en ROT 3283 en ρ2 Cep en ρ² Cep da 29 Cephei de Al Kalb al Rai de 29 Cephei es 29 Cephei
🔖 Identifiers · 3
Freebase ID
/m/08sg5w
Gaia ID
2285649898351302656
SIMBAD ID
* rho Cep

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🔗 Connections
Constellation 1
Cepheus
Epoch 1
J2000.0
Instance of 1
star
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References

Programmatic citations — every numbered marker resolves to a verifiable graph row below.

Direct Wikidata claims

  1. [1] ↑ . SIMBAD. wikidata.org.
  2. [2] ↑ . SIMBAD. wikidata.org.
  3. [3] ↑ . SIMBAD. wikidata.org.
  4. [4] ↑ . wikidata.org.
  5. [5] ↑ . A study of the bright A stars. I. A catalogue of spectral classifications. wikidata.org.
  6. [6] ↑ . The radial velocities spectral types and projected rotational velocities of 633 bright northern A stars. wikidata.org.
  7. [7] ↑ . VizieR Online Data Catalog: Henry Draper Catalogue and Extension, published in Ann. Harvard Obs. 91-100 (1918-1925). wikidata.org.
  8. [8] ↑ . SIMBAD. wikidata.org.
  9. [9] ↑ . SIMBAD. wikidata.org.
  10. [10] ↑ . SIMBAD. wikidata.org.
  11. [11] ↑ . SIMBAD. wikidata.org.
  12. [12] ↑ . SIMBAD. wikidata.org.
  13. [13] ↑ . SIMBAD. wikidata.org.
  14. [14] ↑ . SIMBAD. wikidata.org.
  15. [15] ↑ . SIMBAD. wikidata.org.
  16. [16] ↑ . SIMBAD. wikidata.org.
  17. [17] ↑ . SIMBAD. wikidata.org.
  18. [18] ↑ . SIMBAD. wikidata.org.
  19. [19] ↑ . SIMBAD. wikidata.org.
  20. [20] ↑ . SIMBAD. wikidata.org.
  21. [21] ↑ . SIMBAD. wikidata.org.
  22. [22] ↑ . UBV photometry of stars whose positions are accurately known. VI. wikidata.org.
  23. [23] ↑ . UBV photometry of stars whose positions are accurately known. VI. wikidata.org.
  24. [24] ↑ . UBV photometry of stars whose positions are accurately known. VI. wikidata.org.
  25. [25] ↑ . VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003). wikidata.org.
  26. [26] ↑ . VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003). wikidata.org.
  27. [27] ↑ . VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003). wikidata.org.
  28. [28] ↑ . Gaia Early Data Release 3. wikidata.org.
  29. [29] ↑ . wikidata.org.
  30. [30] ↑ . wikidata.org.
  31. [31] ↑ . Gaia Data Release 2. wikidata.org.
  32. [32] ↑ . The General Catalogue of Trigonometric Stellar Parallaxes, Fourth Edition. wikidata.org.
  33. [33] ↑ . Validation of the new Hipparcos reduction. wikidata.org.
  34. [34] ↑ . Gaia Data Release 1. Summary of the astrometric, photometric, and survey properties. wikidata.org.
  35. [35] ↑ . The HIPPARCOS Catalogue. wikidata.org.
  36. [36] ↑ . Gaia Early Data Release 3. wikidata.org.
  37. [37] ↑ . Vitesses radiales. Catalogue WEB: Wilson Evans Batten. Radial velocities: The Wilson-Evans-Batten catalogue. wikidata.org.
  38. [38] ↑ . Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system. wikidata.org.
  39. [39] ↑ . The radial velocities spectral types and projected rotational velocities of 633 bright northern A stars. wikidata.org.
  40. [40] ↑ . Radial velocities of 360 stars. wikidata.org.
  41. [41] ↑ . The radial velocities of 917 stars. wikidata.org.
  42. [42] ↑ . Catalogue of observed velocities. wikidata.org.
  43. [43] ↑ . SIMBAD. wikidata.org.
  44. [44] ↑ . Gaia Data Release 2. wikidata.org.
  45. [45] ↑ . Gaia Early Data Release 3. wikidata.org.
  46. [46] ↑ . Rotational velocities of A-type stars. III. Velocity distributions. wikidata.org.
  47. [47] ↑ . The Relation between Rotational Velocities and Spectral Peculiarities among A-Type Stars. wikidata.org.
  48. [48] ↑ . Gaia Early Data Release 3. wikidata.org.
  49. [49] ↑ . Gaia Early Data Release 3. wikidata.org.
  50. [50] ↑ . Gaia Data Release 2. wikidata.org.
  51. [51] ↑ . Rotational velocities of A-type stars. IV. Evolution of rotational velocities. wikidata.org.
  52. [52] ↑ . wikidata.org.
  53. [53] ↑ . Gaia Data Release 2. wikidata.org.
  54. [54] ↑ . Validation of the new Hipparcos reduction. wikidata.org.
  55. [55] ↑ . The HIPPARCOS Catalogue. wikidata.org.
  56. [56] ↑ . SIMBAD. wikidata.org.
  57. [57] ↑ . Catalog of 5268 standard stars for the equinox and epoch 1950.0 based on the Normal Star System N30. wikidata.org.
  58. [58] ↑ . AGK3. wikidata.org.
  59. [59] ↑ . Gaia Early Data Release 3. wikidata.org.
  60. [60] ↑ . Gaia Data Release 2. wikidata.org.
  61. [61] ↑ . Validation of the new Hipparcos reduction. wikidata.org.
  62. [62] ↑ . The HIPPARCOS Catalogue. wikidata.org.

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Use these citations when quoting this entity in research, articles, AI prompts, or wherever provenance matters. We aggregate Wikidata + Wikipedia + authoritative open-data sources; the stitched, scored, cross-referenced view is what 4ort.xyz contributes.

APA 4ort.xyz Knowledge Graph. (2026). Rho2 Cephei. Retrieved November 12, 2026, from https://4ort.xyz/entity/rho2-cephei
MLA “Rho2 Cephei.” 4ort.xyz Knowledge Graph, 4ort.xyz, 12 Nov. 2026, https://4ort.xyz/entity/rho2-cephei.
BibTeX @misc{4ortxyz_rho2-cephei_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{Rho2 Cephei}}, year = {2026}, url = {https://4ort.xyz/entity/rho2-cephei}, note = {Accessed: 2026-11-12}}
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Edit History

Rolling log of changes to this entity's Wikidata record. Values shown reflect the current state of each edited property — follow the history link to see the precise diff for any edit.

  1. 7d ago · Porrima · 2026-11-07 view diff on Wikidata ↗
    Right ascension → 337.470742 degree
    Apparent magnitude → 5.62, 5.54, 5.46 +4
    Absolute magnitude → 1.07
    Effective temperature → 8,511 kelvin
    + 13 other properties edited (see Wikidata diff for full list)
    "Changed [mul] label: ρ2 Cephei, batch #294281"
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