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Abell 1991

Galaxy cluster
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Abell 1991

Summary

Abell 1991 is a galaxy cluster[1].

Key Facts

  • Abell 1991's instance of is recorded as galaxy cluster[2].
  • Abell 1991's constellation is recorded as Boötes[3].
  • Abell 1991's catalog code is recorded as 1ES 1452+18.8[4].
  • Abell 1991's catalog code is recorded as RBS 1443[5].
  • Abell 1991's catalog code is recorded as 1RXS J145431.4+183834[6].
  • Abell 1991's catalog code is recorded as 4U 1455+19[7].
  • Abell 1991's catalog code is recorded as INTREF 625[8].
  • Abell 1991's catalog code is recorded as [F81] 305[9].
  • Abell 1991's catalog code is recorded as EXSS 1452.2+1850[10].
  • Abell 1991's catalog code is recorded as RX J1454.5+1838[11].
  • Abell 1991's catalog code is recorded as MCXC J1454.5+1838[12].
  • Abell 1991's catalog code is recorded as [SPD2011] 520[13].
  • Abell 1991's Freebase ID is recorded as /m/0j623jm[14].
  • Abell 1991's redshift is recorded as {'unit': '1', 'amount': '+0.05901'}[15].
  • Abell 1991's radial velocity is recorded as {'unit': 'http://www.wikidata.org/entity/Q3674704', 'amount': '+17054'}[16].
  • Abell 1991's SIMBAD ID is recorded as ACO 1991[17].
  • Abell 1991's right ascension is recorded as {'unit': 'http://www.wikidata.org/entity/Q28390', 'amount': '+223.62583'}[18].
  • Abell 1991's declination is recorded as {'unit': 'http://www.wikidata.org/entity/Q28390', 'amount': '+18.63083'}[19].
  • Abell 1991's epoch is recorded as J2000.0[20].

References

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

Direct Wikidata claims

  1. [2] ↑ . SIMBAD. wikidata.org.
  2. [3] ↑ . 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] ↑ . SIMBAD. wikidata.org.
  9. [10] ↑ . SIMBAD. wikidata.org.
  10. [11] ↑ . SIMBAD. wikidata.org.
  11. [12] ↑ . SIMBAD. wikidata.org.
  12. [13] ↑ . SIMBAD. wikidata.org.
  13. [14] ↑ . wikidata.org.
  14. [15] ↑ . Optical emission line nebulae in galaxy cluster cores 1: the morphological, kinematic and spectral properties of the sample. wikidata.org.
  15. [16] ↑ . A compilation of redshifts and velocity dispersions for Abell clusters. wikidata.org.
  16. [17] ↑ . SIMBAD. wikidata.org.
  17. [18] ↑ . The L_X_-{sigma} relation for galaxies and clusters of galaxies. wikidata.org.
  18. [19] ↑ . The L_X_-{sigma} relation for galaxies and clusters of galaxies. wikidata.org.
  19. [20] ↑ . The L_X_-{sigma} relation for galaxies and clusters of galaxies. 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). Abell 1991. Retrieved May 3, 2026, from https://4ort.xyz/entity/abell-1991
MLA “Abell 1991.” 4ort.xyz Knowledge Graph, 4ort.xyz, 3 May. 2026, https://4ort.xyz/entity/abell-1991.
BibTeX @misc{4ortxyz_abell-1991_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{Abell 1991}}, year = {2026}, url = {https://4ort.xyz/entity/abell-1991}, note = {Accessed: 2026-05-03}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): Abell 1991 — https://4ort.xyz/entity/abell-1991 (retrieved 2026-05-03)

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