Q78204794

hot subdwarf star in the constellation Boötes

Thing hot_subdwarf_star Q78204794

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Q78204794

Summary

Q78204794 is a hot subdwarf star^[1].

Key Facts

Q78204794's instance of is recorded as hot subdwarf star^[2].
Q78204794's constellation is recorded as Boötes^[3].
Q78204794's spectral class is recorded as sdOHe^[4].
Q78204794's catalog code is recorded as GALEX J154043.1+435950^[5].
Q78204794's catalog code is recorded as SDSS J154043.09+435950.1^[6].
Q78204794's catalog code is recorded as FBS 1539+441^[7].
Q78204794's catalog code is recorded as FBS B 359^[8].
Q78204794's catalog code is recorded as PG 1539+442^[9].
Q78204794's catalog code is recorded as SDSS J154043.10+435950.0^[10].
Q78204794's catalog code is recorded as USNO-B1.0 1339-00262004^[11].
Q78204794's catalog code is recorded as Gaia DR2 1397273842027833856^[12].
Q78204794's redshift is recorded as {'unit': '1', 'amount': '-0.00024'}^[13].
Q78204794's apparent magnitude is recorded as {'unit': '1', 'amount': '+16.6'}^[14].
Q78204794's apparent magnitude is recorded as {'unit': '1', 'amount': '+16.5'}^[15].
Q78204794's apparent magnitude is recorded as {'unit': '1', 'amount': '+15.806'}^[16].
Q78204794's apparent magnitude is recorded as {'unit': '1', 'amount': '+16.212'}^[17].
Q78204794's apparent magnitude is recorded as {'unit': '1', 'amount': '+16.752'}^[18].
Q78204794's apparent magnitude is recorded as {'unit': '1', 'amount': '+17.119'}^[19].
Q78204794's apparent magnitude is recorded as {'unit': '1', 'amount': '+17.459'}^[20].
Q78204794's apparent magnitude is recorded as {'unit': '1', 'amount': '+16.5189'}^[21].
Q78204794's parallax is recorded as {'unit': 'http://www.wikidata.org/entity/Q21500224', 'amount': '+0.1825'}^[22].
Q78204794's radial velocity is recorded as {'unit': 'http://www.wikidata.org/entity/Q3674704', 'amount': '-72'}^[23].
Q78204794's distance from Earth is recorded as {'unit': 'http://www.wikidata.org/entity/Q12129', 'amount': '+400'}^[24].
Q78204794's SIMBAD ID is recorded as PG 1539+442^[25].
Q78204794's right ascension is recorded as {'unit': 'http://www.wikidata.org/entity/Q28390', 'amount': '+235.17958747089900'}^[26].

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Quick Facts

Instance of hot subdwarf star

Properties

Apparent magnitude unit: 1, amount: +16.6, unit: 1, amount: +16.5, unit: 1, amount: +15.806, unit: 1, amount: +16.212, unit: 1, amount: +16.752, unit: 1, amount: +17.119, unit: 1, amount: +17.459, unit: 1, amount: +16.5189

Catalog code GALEX J154043.1+435950, SDSS J154043.09+435950.1, FBS 1539+441, FBS B 359, PG 1539+442, SDSS J154043.10+435950.0, USNO-B1.0 1339-00262004, Gaia DR2 1397273842027833856

Constellation Boötes

Declination unit: www.wikidata.org, amount: +43.99724110571800

Declination component of proper motion unit: www.wikidata.org, amount: -8.009

Distance from earth unit: www.wikidata.org, amount: +400

Effective temperature unit: www.wikidata.org, amount: +48462

Epoch J2000.0

Imported from wholeness_audit_2026-05-02_v2

Parallax unit: www.wikidata.org, amount: +0.1825

Radial velocity unit: www.wikidata.org, amount: -72

Redshift unit: 1, amount: -0.00024

Right ascension unit: www.wikidata.org, amount: +235.17958747089900

Right ascension component of proper motion unit: www.wikidata.org, amount: -2.384

Spectral class sdOHe

Surface gravity unit: www.wikidata.org, amount: +68000000

External References (2)

Gaia id 1397273842027833856

Simbad id PG 1539+442

References

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

Direct Wikidata claims

[2] ↑ Q78204794 — instance of (P31): hot subdwarf star. SIMBAD. wikidata.org.
[3] ↑ Q78204794 — constellation (P59): Boötes. wikidata.org.
[4] ↑ Q78204794 — spectral class (P215): sdOHe. New white dwarf stars in the Sloan Digital Sky Survey Data Release 10. wikidata.org.
[5] ↑ Q78204794 — catalog code (P528): GALEX J154043.1+435950. SIMBAD. wikidata.org.
[6] ↑ Q78204794 — catalog code (P528): SDSS J154043.09+435950.1. SIMBAD. wikidata.org.
[7] ↑ Q78204794 — catalog code (P528): FBS 1539+441. SIMBAD. wikidata.org.
[8] ↑ Q78204794 — catalog code (P528): FBS B 359. SIMBAD. wikidata.org.
[9] ↑ Q78204794 — catalog code (P528): PG 1539+442. SIMBAD. wikidata.org.
[10] ↑ Q78204794 — catalog code (P528): SDSS J154043.10+435950.0. SIMBAD. wikidata.org.
[11] ↑ Q78204794 — catalog code (P528): USNO-B1.0 1339-00262004. SIMBAD. wikidata.org.
[12] ↑ Q78204794 — catalog code (P528): Gaia DR2 1397273842027833856. SIMBAD. wikidata.org.
[13] ↑ Q78204794 — redshift (P1090): {'unit': '1', 'amount': '-0.00024'}. The Sixth Data Release of the Sloan Digital Sky Survey. wikidata.org.
[14] ↑ Q78204794 — apparent magnitude (P1215): {'unit': '1', 'amount': '+16.6'}. The USNO-B Catalog. wikidata.org.
[15] ↑ Q78204794 — apparent magnitude (P1215): {'unit': '1', 'amount': '+16.5'}. The USNO-B Catalog. wikidata.org.
[16] ↑ Q78204794 — apparent magnitude (P1215): {'unit': '1', 'amount': '+15.806'}. The SDSS Photometric Catalog, Release 9. wikidata.org.
[17] ↑ Q78204794 — apparent magnitude (P1215): {'unit': '1', 'amount': '+16.212'}. The SDSS Photometric Catalog, Release 9. wikidata.org.
[18] ↑ Q78204794 — apparent magnitude (P1215): {'unit': '1', 'amount': '+16.752'}. The SDSS Photometric Catalog, Release 9. wikidata.org.
[19] ↑ Q78204794 — apparent magnitude (P1215): {'unit': '1', 'amount': '+17.119'}. The SDSS Photometric Catalog, Release 9. wikidata.org.
[20] ↑ Q78204794 — apparent magnitude (P1215): {'unit': '1', 'amount': '+17.459'}. The SDSS Photometric Catalog, Release 9. wikidata.org.
[21] ↑ Q78204794 — apparent magnitude (P1215): {'unit': '1', 'amount': '+16.5189'}. Gaia Data Release 2. wikidata.org.
[22] ↑ Q78204794 — parallax (P2214): {'unit': 'http://www.wikidata.org/entity/Q21500224', 'amount': '+0.1825'}. Gaia Data Release 2. wikidata.org.
[23] ↑ Q78204794 — radial velocity (P2216): {'unit': 'http://www.wikidata.org/entity/Q3674704', 'amount': '-72'}. The Sixth Data Release of the Sloan Digital Sky Survey. wikidata.org.
[24] ↑ Q78204794 — distance from Earth (P2583): {'unit': 'http://www.wikidata.org/entity/Q12129', 'amount': '+400'}. DA white dwarfs in Sloan Digital Sky Survey Data Release 7 and a search for infrared excess emission. wikidata.org.
[25] ↑ Q78204794 — SIMBAD ID (P3083): PG 1539+442. wikidata.org.
[26] ↑ Q78204794 — right ascension (P6257): {'unit': 'http://www.wikidata.org/entity/Q28390', 'amount': '+235.17958747089900'}. Gaia Data Release 2. wikidata.org.

Class ancestry

[1] ↑ Q78204794 is an instance of hot subdwarf star (Q54231557) [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). Q78204794. Retrieved May 7, 2026, from https://4ort.xyz/entity/q78204794

MLA “Q78204794.” 4ort.xyz Knowledge Graph, 4ort.xyz, 7 May. 2026, https://4ort.xyz/entity/q78204794.

BibTeX

@misc{4ortxyz_q78204794_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{Q78204794}}, year = {2026}, url = {https://4ort.xyz/entity/q78204794}, note = {Accessed: 2026-05-07}}

LLM prompt

According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): Q78204794 — https://4ort.xyz/entity/q78204794 (retrieved 2026-05-07)

Canonical URL: https://4ort.xyz/entity/q78204794 · Last refreshed: May 7, 2026