Q81754006

white dwarf in the constellation Boötes

Thing white_dwarf Q81754006

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Q81754006

Summary

Q81754006 is a white dwarf^[1].

Key Facts

Q81754006's instance of is recorded as white dwarf^[2].
Q81754006's constellation is recorded as Boötes^[3].
Q81754006's spectral class is recorded as DA^[4].
Q81754006's catalog code is recorded as SDSS J144020.23+542526.5^[5].
Q81754006's catalog code is recorded as Gaia DR2 1606886491094242048^[6].
Q81754006's apparent magnitude is recorded as {'unit': '1', 'amount': '+21.141'}^[7].
Q81754006's apparent magnitude is recorded as {'unit': '1', 'amount': '+20.756'}^[8].
Q81754006's apparent magnitude is recorded as {'unit': '1', 'amount': '+20.728'}^[9].
Q81754006's apparent magnitude is recorded as {'unit': '1', 'amount': '+20.706'}^[10].
Q81754006's apparent magnitude is recorded as {'unit': '1', 'amount': '+20.873'}^[11].
Q81754006's apparent magnitude is recorded as {'unit': '1', 'amount': '+20.7818'}^[12].
Q81754006's parallax is recorded as {'unit': 'http://www.wikidata.org/entity/Q21500224', 'amount': '+4.2255'}^[13].
Q81754006's right ascension is recorded as {'unit': 'http://www.wikidata.org/entity/Q28390', 'amount': '+220.08433085786970'}^[14].
Q81754006's declination is recorded as {'unit': 'http://www.wikidata.org/entity/Q28390', 'amount': '+54.42397525295170'}^[15].
Q81754006's epoch is recorded as J2000.0^[16].
Q81754006's effective temperature is recorded as {'unit': 'http://www.wikidata.org/entity/Q11579', 'amount': '+11370'}^[17].
Q81754006's surface gravity is recorded as {'unit': 'http://www.wikidata.org/entity/Q39699418', 'amount': '+37000000'}^[18].
Q81754006's declination component of proper motion is recorded as {'unit': 'http://www.wikidata.org/entity/Q22137107', 'amount': '-11.782'}^[19].
Q81754006's right ascension component of proper motion is recorded as {'unit': 'http://www.wikidata.org/entity/Q22137107', 'amount': '-17.672'}^[20].

Body

Definition and Type

Q81754006's instance of is recorded as white dwarf^[2].

⭐ Popularity Graph

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Quick Facts

Instance of white dwarf

Properties

Apparent magnitude unit: 1, amount: +21.141, unit: 1, amount: +20.756, unit: 1, amount: +20.728, unit: 1, amount: +20.706, unit: 1, amount: +20.873, unit: 1, amount: +20.7818

Catalog code SDSS J144020.23+542526.5, Gaia DR2 1606886491094242048

Constellation Boötes

Declination unit: www.wikidata.org, amount: +54.42397525295170

Declination component of proper motion unit: www.wikidata.org, amount: -11.782

Effective temperature unit: www.wikidata.org, amount: +11370

Epoch J2000.0

Imported from wholeness_audit_2026-05-02_v2

Parallax unit: www.wikidata.org, amount: +4.2255

Right ascension unit: www.wikidata.org, amount: +220.08433085786970

Right ascension component of proper motion unit: www.wikidata.org, amount: -17.672

Spectral class DA

Surface gravity unit: www.wikidata.org, amount: +37000000

External References (2)

Gaia id 1606886491094242048

Simbad id SDSS J144020.23+542526.2

References

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

Direct Wikidata claims

[2] ↑ Q81754006 — instance of (P31): white dwarf. SIMBAD. wikidata.org.
[3] ↑ Q81754006 — constellation (P59): Boötes. wikidata.org.
[4] ↑ Q81754006 — spectral class (P215): DA. New white dwarf and subdwarf stars in the Sloan Digital Sky Survey Data Release 12. wikidata.org.
[5] ↑ Q81754006 — catalog code (P528): SDSS J144020.23+542526.5. SIMBAD. wikidata.org.
[6] ↑ Q81754006 — catalog code (P528): Gaia DR2 1606886491094242048. SIMBAD. wikidata.org.
[7] ↑ Q81754006 — apparent magnitude (P1215): {'unit': '1', 'amount': '+21.141'}. New white dwarf and subdwarf stars in the Sloan Digital Sky Survey Data Release 12. wikidata.org.
[8] ↑ Q81754006 — apparent magnitude (P1215): {'unit': '1', 'amount': '+20.756'}. New white dwarf and subdwarf stars in the Sloan Digital Sky Survey Data Release 12. wikidata.org.
[9] ↑ Q81754006 — apparent magnitude (P1215): {'unit': '1', 'amount': '+20.728'}. New white dwarf and subdwarf stars in the Sloan Digital Sky Survey Data Release 12. wikidata.org.
[10] ↑ Q81754006 — apparent magnitude (P1215): {'unit': '1', 'amount': '+20.706'}. New white dwarf and subdwarf stars in the Sloan Digital Sky Survey Data Release 12. wikidata.org.
[11] ↑ Q81754006 — apparent magnitude (P1215): {'unit': '1', 'amount': '+20.873'}. New white dwarf and subdwarf stars in the Sloan Digital Sky Survey Data Release 12. wikidata.org.
[12] ↑ Q81754006 — apparent magnitude (P1215): {'unit': '1', 'amount': '+20.7818'}. Gaia Data Release 2. wikidata.org.
[13] ↑ Q81754006 — parallax (P2214): {'unit': 'http://www.wikidata.org/entity/Q21500224', 'amount': '+4.2255'}. Gaia Data Release 2. wikidata.org.
[14] ↑ Q81754006 — right ascension (P6257): {'unit': 'http://www.wikidata.org/entity/Q28390', 'amount': '+220.08433085786970'}. Gaia Data Release 2. wikidata.org.
[15] ↑ Q81754006 — declination (P6258): {'unit': 'http://www.wikidata.org/entity/Q28390', 'amount': '+54.42397525295170'}. Gaia Data Release 2. wikidata.org.
[16] ↑ Q81754006 — epoch (P6259): J2000.0. Gaia Data Release 2. wikidata.org.
[17] ↑ Q81754006 — effective temperature (P6879): {'unit': 'http://www.wikidata.org/entity/Q11579', 'amount': '+11370'}. New white dwarf and subdwarf stars in the Sloan Digital Sky Survey Data Release 12. wikidata.org.
[18] ↑ Q81754006 — surface gravity (P7015): {'unit': 'http://www.wikidata.org/entity/Q39699418', 'amount': '+37000000'}. New white dwarf and subdwarf stars in the Sloan Digital Sky Survey Data Release 12. wikidata.org.
[19] ↑ Q81754006 — declination component of proper motion (P10751): {'unit': 'http://www.wikidata.org/entity/Q22137107', 'amount': '-11.782'}. Gaia Data Release 2. wikidata.org.
[20] ↑ Q81754006 — right ascension component of proper motion (P10752): {'unit': 'http://www.wikidata.org/entity/Q22137107', 'amount': '-17.672'}. Gaia Data Release 2. wikidata.org.

Class ancestry

[1] ↑ Q81754006 is an instance of white dwarf (Q5871) [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). Q81754006. Retrieved May 7, 2026, from https://4ort.xyz/entity/q81754006

MLA “Q81754006.” 4ort.xyz Knowledge Graph, 4ort.xyz, 7 May. 2026, https://4ort.xyz/entity/q81754006.

BibTeX

@misc{4ortxyz_q81754006_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{Q81754006}}, year = {2026}, url = {https://4ort.xyz/entity/q81754006}, note = {Accessed: 2026-05-07}}

LLM prompt

According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): Q81754006 — https://4ort.xyz/entity/q81754006 (retrieved 2026-05-07)

Canonical URL: https://4ort.xyz/entity/q81754006 · Last refreshed: May 7, 2026