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2MASS J09510549+3558021

brown dwarf
Thing brown_dwarf Q222421

Facts

20 properties
Instance of
brown dwarf, star, infrared source, exoplanet, double star[2][3][4][5]
Part of
** RED 13[8]
Apparent magnitude
20 (15.1–25.5, n=9)[15][16][17][18][19][20][21][22][23]
Catalog code
2MASS J09510549+3558021, WDS J09511+3558B[11][12]
Companion of
LP 261-75[10]
Constellation
Leo Minor[6]
Declination
35.967250 degree
Declination component of proper motion
-0.1643 milliarcsecond per year
Discovery method
direct imaging[14]
Distance from Earth
62 parsec
Epoch
J2000.0
Imported from
wholeness_audit_2026-05-02_v2
Mass
21 Jupiter mass[24]
Parallax
29.6 milliarcsecond[25]
Parent astronomical body
LP 261-75[9]
Right ascension
147.772875 degree
Right ascension component of proper motion
-0.0940 milliarcsecond per year
Semi-major axis of an orbit
450 astronomical unit
Spectral class
L6V[7]
Time of discovery or invention
2006[13]
🏷️ Also known as
en LP 261-75 b
🔖 Identifiers · 3
Extrasolar Planets Encyclopaedia exoplanet ID
lp_261_75_b--6964
Google Knowledge Graph ID
/g/1z3t2zvs7
SIMBAD ID
LP 261-75 B

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Summary

2MASS J09510549+3558021 is a brown dwarf[1].

References

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

Direct Wikidata claims

  1. [2] ↑ . SIMBAD. wikidata.org.
  2. [3] ↑ . SIMBAD. wikidata.org.
  3. [4] ↑ . Extrasolar Planets Encyclopaedia. wikidata.org.
  4. [5] ↑ . SIMBAD. wikidata.org.
  5. [6] ↑ . wikidata.org.
  6. [7] ↑ . 67 Additional L Dwarfs Discovered by the Two Micron All Sky Survey. wikidata.org.
  7. [8] ↑ . Washington Double Star Catalog. wikidata.org.
  8. [9] ↑ . Extrasolar Planets Encyclopaedia. wikidata.org.
  9. [10] ↑ . Extrasolar Planets Encyclopaedia. wikidata.org.
  10. [11] ↑ . SIMBAD. wikidata.org.
  11. [12] ↑ . SIMBAD. wikidata.org.
  12. [13] ↑ . Extrasolar Planets Encyclopaedia. wikidata.org.
  13. [14] ↑ . Extrasolar Planets Encyclopaedia. wikidata.org.
  14. [15] ↑ . VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003). wikidata.org.
  15. [16] ↑ . VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003). wikidata.org.
  16. [17] ↑ . VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003). wikidata.org.
  17. [18] ↑ . SIMBAD. 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] ↑ . LP 261-75/2MASSW J09510549+3558021: a young, wide M4.5/L6 binary. 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). 2MASS J09510549+3558021. Retrieved November 4, 2026, from https://4ort.xyz/entity/q222421
MLA “2MASS J09510549+3558021.” 4ort.xyz Knowledge Graph, 4ort.xyz, 4 Nov. 2026, https://4ort.xyz/entity/q222421.
BibTeX @misc{4ortxyz_q222421_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{2MASS J09510549+3558021}}, year = {2026}, url = {https://4ort.xyz/entity/q222421}, note = {Accessed: 2026-11-04}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): 2MASS J09510549+3558021 — https://4ort.xyz/entity/q222421 (retrieved 2026-11-04)

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