Messier 99

galaxy
Thing astronomical_radio_source Q14364
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Messier 99

Summary

Messier 99 is an astronomical radio source[1]. It ranks in the top 5% of astronomical_radio_source entities by monthly Wikipedia readership (84 views/month).[2]

Key Facts

  • Messier 99 is credited with the discovery of Pierre Méchain[3].
  • Messier 99's instance of is recorded as astronomical radio source[4].
  • Messier 99's instance of is recorded as sub-millimetric source[5].
  • Messier 99's instance of is recorded as HI (21cm) source[6].
  • Messier 99's instance of is recorded as infrared source[7].
  • Messier 99's instance of is recorded as astrophysical X-ray source[8].
  • Messier 99's instance of is recorded as grand design spiral galaxy[9].
  • Messier 99's constellation is recorded as Coma Berenices[10].
  • Messier 99's galaxy morphological type is recorded as SA(s)c[11].
  • Messier 99's galaxy morphological type is recorded as Sc(dSc)[12].
  • Messier 99 is part of Virgo Cluster[13].
  • Messier 99 is part of Q67623486[14].
  • Messier 99 is part of Q67625638[15].
  • Messier 99 is part of Q67790367[16].
  • Messier 99 is part of Q67795770[17].
  • Messier 99's Commons category is recorded as Messier 99[18].
  • Messier 99 comprises Q83725959[19].
  • Messier 99 comprises Q9326556[20].
  • Messier 99 comprises Q9326659[21].
  • Messier 99 comprises Q9326896[22].
  • Messier 99 comprises Q78180600[23].
  • Messier 99's catalog code is recorded as M99[24].
  • Messier 99's catalog code is recorded as IRAS 12162+1441[25].
  • Messier 99's catalog code is recorded as PGC 39578[26].
  • Messier 99's catalog code is recorded as 2MASX J12184962+1424593[27].

Body

Definition and Type

Recorded instance of include astronomical radio source[4], sub-millimetric source[5], HI (21cm) source[6], infrared source[7], astrophysical X-ray source[8], and grand design spiral galaxy[9].

Use and Application

Components include Q83725959[19]; Q9326556[20], a supernova[28]; Q9326659[21], a supernova[29]; Q9326896[22], a supernova[30]; and Q78180600[23]. Part of include Virgo Cluster[13], a galaxy cluster[31]; Q67623486[14]; Q67625638[15]; Q67790367[16]; and Q67795770[17].

Why It Matters

Messier 99 ranks in the top 5% of astronomical_radio_source entities by monthly Wikipedia readership (84 views/month).[2] It has Wikipedia articles in 27 language editions, a strong signal of global cultural recognition.[32] It is known by 11 alternative names across languages and contexts.[33]

References

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

Direct Wikidata claims

  1. [4] ↑ . SIMBAD. wikidata.org.
  2. [5] ↑ . SIMBAD. wikidata.org.
  3. [6] ↑ . SIMBAD. wikidata.org.
  4. [7] ↑ . SIMBAD. wikidata.org.
  5. [8] ↑ . SIMBAD. wikidata.org.
  6. [9] ↑ . wikidata.org.
  7. [10] ↑ . VizieR. wikidata.org.
  8. [3] ↑ . messier.seds.org. Retrieved . messier.seds.org. Provenance: wikidata.org.
  9. [11] ↑ . NASA/IPAC Extragalactic Database. Retrieved . ned.ipac.caltech.edu. Provenance: wikidata.org.
  10. [12] ↑ . The GALEX Ultraviolet Virgo Cluster Survey (GUViCS) III. The ultraviolet source catalogs. wikidata.org.
  11. [13] ↑ . SIMBAD. wikidata.org.
  12. [14] ↑ . SIMBAD. wikidata.org.
  13. [15] ↑ . SIMBAD. wikidata.org.
  14. [16] ↑ . SIMBAD. wikidata.org.
  15. [17] ↑ . SIMBAD. wikidata.org.
  16. [18] ↑ . wikidata.org.
  17. [19] ↑ . PTF 10fqs: A LUMINOUS RED NOVA IN THE SPIRAL GALAXY MESSIER 99. wikidata.org.
  18. [20] ↑ . SIMBAD. cbat.eps.harvard.edu. Provenance: wikidata.org.
  19. [21] ↑ . SIMBAD. wikidata.org.
  20. [22] ↑ . SIMBAD. wikidata.org.
  21. [23] ↑ . SIMBAD. wikidata.org.
  22. [24] ↑ . SIMBAD. wikidata.org.
  23. [25] ↑ . SIMBAD. wikidata.org.
  24. [26] ↑ . SIMBAD. Retrieved . haroldcorwin.net. Provenance: wikidata.org.
  25. [27] ↑ . SIMBAD. wikidata.org.

Inline context (facts about related entities)

  1. [31] ↑ . Wikidata. wikidata.org. → on this site
  2. [28] ↑ . Wikidata. wikidata.org. → on this site
  3. [29] ↑ . Wikidata. wikidata.org. → on this site
  4. [30] ↑ . Wikidata. wikidata.org. → on this site

Class ancestry

  1. [1] ↑ . Wikidata. wikidata.org.

Aggregate / graph-position facts

  1. [2] ↑ . Wikimedia Foundation. dumps.wikimedia.org.
  2. [32] ↑ . Wikidata sitelinks. wikidata.org.
  3. [33] ↑ . Wikidata aliases. 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). Messier 99. Retrieved October 5, 2026, from https://4ort.xyz/entity/messier-99
MLA “Messier 99.” 4ort.xyz Knowledge Graph, 4ort.xyz, 5 Oct. 2026, https://4ort.xyz/entity/messier-99.
BibTeX @misc{4ortxyz_messier-99_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{Messier 99}}, year = {2026}, url = {https://4ort.xyz/entity/messier-99}, note = {Accessed: 2026-10-05}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): Messier 99 — https://4ort.xyz/entity/messier-99 (retrieved 2026-10-05)

Canonical URL: https://4ort.xyz/entity/messier-99 · Last refreshed:

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. 18h ago · MatSuBot bot · 2026-10-05 view diff on Wikidata ↗
    Sitelink count → 55
    Wikipedia languages → ['af', 'ar', 'ast', 'az', 'be', 'be_x_old', 'bg', 'bs', 'ca', 'ce', 'co', 'commo
    Claims rich → —
    "/* wbeditentity-update-languages-short:0||ru, mk */ import labels from sitelinks; cleanup"
  2. 17w ago · Phantomdj · 2026-06-06 view diff on Wikidata ↗
    Right ascension → {'unit': 'Q28390', 'amount': '+184.7067708'}
    Redshift → {'amount': '+0.008036'}, {'amount': '+0.00802'}, {'amount': '+0.008020'} +1
    Apparent magnitude → {'amount': '+9.87'}, {'amount': '+10.45'}, {'amount': '+10.44'} +3
    Part of → —
    + 14 other properties edited (see Wikidata diff for full list)
    "/* wbsetclaim-update:2||1|1 */ [[Property:P527]]: [[Q9326896]]"
Live feed via Wikidata EventStreams. New edits appear within minutes of being made on Wikidata.