Q91540389

RR Lyrae variable star in the constellation Aquarius

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Q91540389

Summary

Q91540389 is a RR Lyrae variable^[1].

Key Facts

Q91540389's instance of is recorded as RR Lyrae variable^[2].
Q91540389's constellation is recorded as Aquarius^[3].
Q91540389 is part of Messier 2^[4].
Q91540389's catalog code is recorded as 2MASS J21331402-0101053^[5].
Q91540389's catalog code is recorded as Cl* NGC 7089 SAW V18^[6].
Q91540389's catalog code is recorded as SDSS J213314.02-010105.3^[7].
Q91540389's catalog code is recorded as [SIG2010] 2396176^[8].
Q91540389's catalog code is recorded as SDSS J213314.02-010105.4^[9].
Q91540389's catalog code is recorded as CRTS J213313.9-010105^[10].
Q91540389's catalog code is recorded as Gaia DR2 2686825407444808320^[11].
Q91540389's type of variable star is recorded as RR Lyrae variable^[12].
Q91540389's apparent magnitude is recorded as {'unit': '1', 'amount': '+16.214'}^[13].
Q91540389's apparent magnitude is recorded as {'unit': '1', 'amount': '+15.962'}^[14].
Q91540389's apparent magnitude is recorded as {'unit': '1', 'amount': '+15.172'}^[15].
Q91540389's apparent magnitude is recorded as {'unit': '1', 'amount': '+14.886'}^[16].
Q91540389's apparent magnitude is recorded as {'unit': '1', 'amount': '+15.259'}^[17].
Q91540389's apparent magnitude is recorded as {'unit': '1', 'amount': '+17.238'}^[18].
Q91540389's apparent magnitude is recorded as {'unit': '1', 'amount': '+15.965'}^[19].
Q91540389's apparent magnitude is recorded as {'unit': '1', 'amount': '+15.886'}^[20].
Q91540389's apparent magnitude is recorded as {'unit': '1', 'amount': '+15.882'}^[21].
Q91540389's apparent magnitude is recorded as {'unit': '1', 'amount': '+15.870'}^[22].
Q91540389's apparent magnitude is recorded as {'unit': '1', 'amount': '+15.9270'}^[23].
Q91540389's radial velocity is recorded as {'unit': 'http://www.wikidata.org/entity/Q3674704', 'amount': '+9.5'}^[24].
Q91540389's distance from Earth is recorded as {'unit': 'http://www.wikidata.org/entity/Q11929860', 'amount': '+10.45'}^[25].
Q91540389's right ascension is recorded as {'unit': 'http://www.wikidata.org/entity/Q28390', 'amount': '+323.30840461009470'}^[26].

Body

Definition and Type

Q91540389's instance of is recorded as RR Lyrae variable^[2].

Use and Application

Q91540389 is part of Messier 2^[4].

⭐ Popularity Graph

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Quick Facts

Instance of RR Lyrae variable

Part of Messier 2

Properties

Apparent magnitude unit: 1, amount: +16.214, unit: 1, amount: +15.962, unit: 1, amount: +15.172, unit: 1, amount: +14.886, unit: 1, amount: +15.259, unit: 1, amount: +17.238, unit: 1, amount: +15.965, unit: 1, amount: +15.886, unit: 1, amount: +15.882, unit: 1, amount: +15.870, unit: 1, amount: +15.9270

Catalog code 2MASS J21331402-0101053, Cl* NGC 7089 SAW V18, SDSS J213314.02-010105.3, [SIG2010] 2396176, SDSS J213314.02-010105.4, CRTS J213313.9-010105, Gaia DR2 2686825407444808320

Constellation Aquarius

Declination unit: www.wikidata.org, amount: -1.01817444613050

Declination component of proper motion unit: www.wikidata.org, amount: -2.184

Distance from earth unit: www.wikidata.org, amount: +10.45

Epoch J2000.0

Imported from wholeness_audit_2026-05-02_v2

Radial velocity unit: www.wikidata.org, amount: +9.5

Right ascension unit: www.wikidata.org, amount: +323.30840461009470

Right ascension component of proper motion unit: www.wikidata.org, amount: +3.615

Type of variable star RR Lyrae variable

External References (2)

Gaia id 2686825407444808320

Simbad id Cl* NGC 7089 SAW V18

References

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

Direct Wikidata claims

[2] ↑ Q91540389 — instance of (P31): RR Lyrae variable. SIMBAD. wikidata.org.
[3] ↑ Q91540389 — constellation (P59): Aquarius. wikidata.org.
[4] ↑ Q91540389 — part of (P361): Messier 2. wikidata.org.
[5] ↑ Q91540389 — catalog code (P528): 2MASS J21331402-0101053. SIMBAD. wikidata.org.
[6] ↑ Q91540389 — catalog code (P528): Cl* NGC 7089 SAW V18. SIMBAD. wikidata.org.
[7] ↑ Q91540389 — catalog code (P528): SDSS J213314.02-010105.3. SIMBAD. wikidata.org.
[8] ↑ Q91540389 — catalog code (P528): [SIG2010] 2396176. SIMBAD. wikidata.org.
[9] ↑ Q91540389 — catalog code (P528): SDSS J213314.02-010105.4. SIMBAD. wikidata.org.
[10] ↑ Q91540389 — catalog code (P528): CRTS J213313.9-010105. SIMBAD. wikidata.org.
[11] ↑ Q91540389 — catalog code (P528): Gaia DR2 2686825407444808320. SIMBAD. wikidata.org.
[12] ↑ Q91540389 — type of variable star (P881): RR Lyrae variable. Newly discovered RR Lyrae stars in the SDSS-Pan-STARRS1-Catalina footprint. wikidata.org.
[13] ↑ Q91540389 — apparent magnitude (P1215): {'unit': '1', 'amount': '+16.214'}. BV photometry of RR Lyrae variables in the globular cluster M2 (NGC 7089). wikidata.org.
[14] ↑ Q91540389 — apparent magnitude (P1215): {'unit': '1', 'amount': '+15.962'}. BV photometry of RR Lyrae variables in the globular cluster M2 (NGC 7089). wikidata.org.
[15] ↑ Q91540389 — apparent magnitude (P1215): {'unit': '1', 'amount': '+15.172'}. VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003). wikidata.org.
[16] ↑ Q91540389 — apparent magnitude (P1215): {'unit': '1', 'amount': '+14.886'}. VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003). wikidata.org.
[17] ↑ Q91540389 — apparent magnitude (P1215): {'unit': '1', 'amount': '+15.259'}. VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003). wikidata.org.
[18] ↑ Q91540389 — apparent magnitude (P1215): {'unit': '1', 'amount': '+17.238'}. The SDSS Photometric Catalog, Release 9. wikidata.org.
[19] ↑ Q91540389 — apparent magnitude (P1215): {'unit': '1', 'amount': '+15.965'}. The SDSS Photometric Catalog, Release 9. wikidata.org.
[20] ↑ Q91540389 — apparent magnitude (P1215): {'unit': '1', 'amount': '+15.886'}. The SDSS Photometric Catalog, Release 9. wikidata.org.
[21] ↑ Q91540389 — apparent magnitude (P1215): {'unit': '1', 'amount': '+15.882'}. The SDSS Photometric Catalog, Release 9. wikidata.org.
[22] ↑ Q91540389 — apparent magnitude (P1215): {'unit': '1', 'amount': '+15.870'}. The SDSS Photometric Catalog, Release 9. wikidata.org.
[23] ↑ Q91540389 — apparent magnitude (P1215): {'unit': '1', 'amount': '+15.9270'}. Gaia Data Release 2. wikidata.org.
[24] ↑ Q91540389 — radial velocity (P2216): {'unit': 'http://www.wikidata.org/entity/Q3674704', 'amount': '+9.5'}. The Milky Way's circular velocity curve to 60 kpc and an estimate of the dark matter halo mass from the kinematics of ~2400 SDSS blue horizontal-branch stars. wikidata.org.
[25] ↑ Q91540389 — distance from Earth (P2583): {'unit': 'http://www.wikidata.org/entity/Q11929860', 'amount': '+10.45'}. Light curve templates and Galactic distribution of RR Lyrae stars from Sloan Digital Sky Survey stripe 82. wikidata.org.
[26] ↑ Q91540389 — right ascension (P6257): {'unit': 'http://www.wikidata.org/entity/Q28390', 'amount': '+323.30840461009470'}. Gaia Data Release 2. wikidata.org.

Class ancestry

[1] ↑ Q91540389 is an instance of RR Lyrae variable (Q726242) [P31, primary]. 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). Q91540389. Retrieved May 7, 2026, from https://4ort.xyz/entity/q91540389

MLA “Q91540389.” 4ort.xyz Knowledge Graph, 4ort.xyz, 7 May. 2026, https://4ort.xyz/entity/q91540389.

BibTeX

@misc{4ortxyz_q91540389_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{Q91540389}}, year = {2026}, url = {https://4ort.xyz/entity/q91540389}, note = {Accessed: 2026-05-07}}

LLM prompt

According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): Q91540389 — https://4ort.xyz/entity/q91540389 (retrieved 2026-05-07)

Canonical URL: https://4ort.xyz/entity/q91540389 · Last refreshed: May 7, 2026