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51 Ophiuchi

star in the constellation
Place be_type_star Q3001945

Facts

19 properties
Instance of
Be-type star, suspected variable, near-infrared source, ultraviolet source, young stellar object, star, A-type main sequence star, Mid-infrared source[2][3][4][5][6][7][8]
Absolute magnitude
-0.69
Age estimated by a dating method
0.3
Apparent magnitude
4.75 (4.3–4.81, n=9)
Catalog code
HD 158643, HIP 85755, HR 6519, SAO 185470, IRAS 17283-2355, 2MASS J17312497-2357453, GSC 06826-00368, c Oph, GC 23717, GCRV 10120, HIC 85755, JP11 2860, N30 3900, NSV 9037, PLX 3973, PLX 3973.00, PPM 266959, TD1 20533, TYC 6826-368-1, UBV 14919, UCAC3 133-237708, uvby98 100158643, YZ 113 12056, [JE82] 900, WEB 14471, Gaia DR2 4110602530665608064, 51 Oph, Gaia DR3 4110602530665608064, TIC 191913102, UBV M 22222, GEN# +1.00158643, SKY# 31624, WISE J173124.97-235746.2[11][12][13][14][15][16][17][18][19][20][21][22][23][24][25]
Constellation
Ophiuchus[9]
Declination
-23.96264300074556
Declination component of proper motion
-25.627
Distance from Earth
125.726
Effective temperature
9840.0
Epoch
J2000.0
Parallax
7.9538
Radial velocity
-16.0
Radius
4.85
Right ascension
262.8539744625691
Right ascension component of proper motion
0.86
Spectral class
B9.5IIIe[10]
Stellar rotational velocity
270.0
Type of variable star
Herbig Ae/Be star
🏷️ Also known as
en UCAC3 133-237708 en 51 Oph en 51 Ophiuchi en c Oph en c Ophiuchi en GC 23717 en GCRV 10120 en GSC 06826-00368 en HD 158643 en HIC 85755 en HIP 85755 en HR 6519 en NSV 9037 en PLX 3973 en PPM 266959 en SAO 185470 en TIC 191913102 en TYC 6826-368-1 de HD 158643 es c Ophiuchi
🔖 Identifiers · 4
ARICNS
04590
Freebase ID
/m/080ntv5
Gaia ID
4110602530665608064
SIMBAD ID
* c Oph

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🔗 Connections
Instance of 4
star, A-type main sequence star, young stellar object, Be-type star
Constellation 1
Ophiuchus
Epoch 1
J2000.0
Type of variable star 1
Herbig Ae/Be star
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Summary

51 Ophiuchi is a Be-type star[1].

References

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

Direct Wikidata claims

  1. [2] ↑ . New Catalogue of Suspected Variable Stars. wikidata.org.
  2. [3] ↑ . SIMBAD. wikidata.org.
  3. [4] ↑ . SIMBAD. wikidata.org.
  4. [5] ↑ . SIMBAD. wikidata.org.
  5. [6] ↑ . SIMBAD. wikidata.org.
  6. [7] ↑ . SIMBAD. wikidata.org.
  7. [8] ↑ . SIMBAD. wikidata.org.
  8. [9] ↑ . wikidata.org.
  9. [10] ↑ . Evolution of emission-line activity in intermediate-mass young stars. wikidata.org.
  10. [11] ↑ . SIMBAD. wikidata.org.
  11. [12] ↑ . SIMBAD. wikidata.org.
  12. [13] ↑ . SIMBAD. wikidata.org.
  13. [14] ↑ . SIMBAD. wikidata.org.
  14. [15] ↑ . SIMBAD. wikidata.org.
  15. [16] ↑ . SIMBAD. wikidata.org.
  16. [17] ↑ . SIMBAD. wikidata.org.
  17. [18] ↑ . wikidata.org.
  18. [19] ↑ . SIMBAD. wikidata.org.
  19. [20] ↑ . SIMBAD. wikidata.org.
  20. [21] ↑ . SIMBAD. wikidata.org.
  21. [22] ↑ . SIMBAD. wikidata.org.
  22. [23] ↑ . SIMBAD. wikidata.org.
  23. [24] ↑ . SIMBAD. wikidata.org.
  24. [25] ↑ . SIMBAD. wikidata.org.

Class ancestry

  1. [1] ↑ . Wikidata. wikidata.org.

📑 Cite this page

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). 51 Ophiuchi. Retrieved November 2, 2026, from https://4ort.xyz/entity/51-ophiuchi
MLA “51 Ophiuchi.” 4ort.xyz Knowledge Graph, 4ort.xyz, 2 Nov. 2026, https://4ort.xyz/entity/51-ophiuchi.
BibTeX @misc{4ortxyz_51-ophiuchi_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{51 Ophiuchi}}, year = {2026}, url = {https://4ort.xyz/entity/51-ophiuchi}, note = {Accessed: 2026-11-02}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): 51 Ophiuchi — https://4ort.xyz/entity/51-ophiuchi (retrieved 2026-11-02)

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