Q84030770

white dwarf in the constellation Corona Borealis

Thing white_dwarf Q84030770

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Q84030770

Summary

Q84030770 is a white dwarf^[1].

Key Facts

Q84030770's instance of is recorded as white dwarf^[2].
Q84030770's constellation is recorded as Corona Borealis^[3].
Q84030770's spectral class is recorded as DA+M^[4].
Q84030770's catalog code is recorded as [RGS2010] J153914.69+263710.8^[5].
Q84030770's catalog code is recorded as SDSS J153914.69+263710.8^[6].
Q84030770's catalog code is recorded as 2MASS J15391469+2637106^[7].
Q84030770's catalog code is recorded as WIRED J153914.69+263710.8^[8].
Q84030770's catalog code is recorded as WD 1537+267^[9].
Q84030770's catalog code is recorded as Gaia DR2 1223935322809681536^[10].
Q84030770's apparent magnitude is recorded as {'unit': '1', 'amount': '+19.211'}^[11].
Q84030770's apparent magnitude is recorded as {'unit': '1', 'amount': '+18.978'}^[12].
Q84030770's apparent magnitude is recorded as {'unit': '1', 'amount': '+18.074'}^[13].
Q84030770's apparent magnitude is recorded as {'unit': '1', 'amount': '+17.357'}^[14].
Q84030770's apparent magnitude is recorded as {'unit': '1', 'amount': '+15.285'}^[15].
Q84030770's apparent magnitude is recorded as {'unit': '1', 'amount': '+14.967'}^[16].
Q84030770's apparent magnitude is recorded as {'unit': '1', 'amount': '+19.616'}^[17].
Q84030770's apparent magnitude is recorded as {'unit': '1', 'amount': '+15.888'}^[18].
Q84030770's apparent magnitude is recorded as {'unit': '1', 'amount': '+18.5073'}^[19].
Q84030770's parallax is recorded as {'unit': 'http://www.wikidata.org/entity/Q21500224', 'amount': '+1.4916'}^[20].
Q84030770's metallicity is recorded as {'unit': '1', 'amount': '+0.0'}^[21].
Q84030770's distance from Earth is recorded as {'unit': 'http://www.wikidata.org/entity/Q12129', 'amount': '+346'}^[22].
Q84030770's SIMBAD ID is recorded as SDSS J153914.69+263710.8^[23].
Q84030770's right ascension is recorded as {'unit': 'http://www.wikidata.org/entity/Q28390', 'amount': '+234.81119183731010'}^[24].
Q84030770's declination is recorded as {'unit': 'http://www.wikidata.org/entity/Q28390', 'amount': '+26.61965243794190'}^[25].
Q84030770's epoch is recorded as J2000.0^[26].

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Quick Facts

Instance of white dwarf

Properties

Apparent magnitude unit: 1, amount: +19.211, unit: 1, amount: +18.978, unit: 1, amount: +18.074, unit: 1, amount: +17.357, unit: 1, amount: +15.285, unit: 1, amount: +14.967, unit: 1, amount: +19.616, unit: 1, amount: +15.888, unit: 1, amount: +18.5073

Catalog code [RGS2010] J153914.69+263710.8, SDSS J153914.69+263710.8, 2MASS J15391469+2637106, WIRED J153914.69+263710.8, WD 1537+267, Gaia DR2 1223935322809681536

Constellation Corona Borealis

Declination unit: www.wikidata.org, amount: +26.61965243794190

Declination component of proper motion unit: www.wikidata.org, amount: +0.590

Distance from earth unit: www.wikidata.org, amount: +346

Effective temperature unit: www.wikidata.org, amount: +6300

Epoch J2000.0

Imported from wholeness_audit_2026-05-02_v2

Metallicity unit: 1, amount: +0.0

Parallax unit: www.wikidata.org, amount: +1.4916

Right ascension unit: www.wikidata.org, amount: +234.81119183731010

Right ascension component of proper motion unit: www.wikidata.org, amount: +6.584

Spectral class DA+M

Surface gravity unit: www.wikidata.org, amount: +510000

External References (2)

Gaia id 1223935322810500736

Simbad id SDSS J153914.69+263710.8

References

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

Direct Wikidata claims

[2] ↑ Q84030770 — instance of (P31): white dwarf. SIMBAD. wikidata.org.
[3] ↑ Q84030770 — constellation (P59): Corona Borealis. wikidata.org.
[4] ↑ Q84030770 — spectral class (P215): DA+M. White dwarf-main sequence binaries identified within SDSS DR7 and UKIDSS DR5. wikidata.org.
[5] ↑ Q84030770 — catalog code (P528): [RGS2010] J153914.69+263710.8. SIMBAD. wikidata.org.
[6] ↑ Q84030770 — catalog code (P528): SDSS J153914.69+263710.8. SIMBAD. wikidata.org.
[7] ↑ Q84030770 — catalog code (P528): 2MASS J15391469+2637106. SIMBAD. wikidata.org.
[8] ↑ Q84030770 — catalog code (P528): WIRED J153914.69+263710.8. SIMBAD. wikidata.org.
[9] ↑ Q84030770 — catalog code (P528): WD 1537+267. SIMBAD. wikidata.org.
[10] ↑ Q84030770 — catalog code (P528): Gaia DR2 1223935322809681536. SIMBAD. wikidata.org.
[11] ↑ Q84030770 — apparent magnitude (P1215): {'unit': '1', 'amount': '+19.211'}. The SDSS Photometric Catalog, Release 7. wikidata.org.
[12] ↑ Q84030770 — apparent magnitude (P1215): {'unit': '1', 'amount': '+18.978'}. The SDSS Photometric Catalog, Release 7. wikidata.org.
[13] ↑ Q84030770 — apparent magnitude (P1215): {'unit': '1', 'amount': '+18.074'}. The SDSS Photometric Catalog, Release 7. wikidata.org.
[14] ↑ Q84030770 — apparent magnitude (P1215): {'unit': '1', 'amount': '+17.357'}. The SDSS Photometric Catalog, Release 7. wikidata.org.
[15] ↑ Q84030770 — apparent magnitude (P1215): {'unit': '1', 'amount': '+15.285'}. VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003). wikidata.org.
[16] ↑ Q84030770 — apparent magnitude (P1215): {'unit': '1', 'amount': '+14.967'}. VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003). wikidata.org.
[17] ↑ Q84030770 — apparent magnitude (P1215): {'unit': '1', 'amount': '+19.616'}. The WIRED survey. II. Infrared excesses in the SDSS DR7 white dwarf catalog. wikidata.org.
[18] ↑ Q84030770 — apparent magnitude (P1215): {'unit': '1', 'amount': '+15.888'}. The WIRED survey. II. Infrared excesses in the SDSS DR7 white dwarf catalog. wikidata.org.
[19] ↑ Q84030770 — apparent magnitude (P1215): {'unit': '1', 'amount': '+18.5073'}. Gaia Data Release 2. wikidata.org.
[20] ↑ Q84030770 — parallax (P2214): {'unit': 'http://www.wikidata.org/entity/Q21500224', 'amount': '+1.4916'}. Gaia Data Release 2. wikidata.org.
[21] ↑ Q84030770 — metallicity (P2227): {'unit': '1', 'amount': '+0.0'}. White dwarf-main sequence binaries identified within SDSS DR7 and UKIDSS DR5. wikidata.org.
[22] ↑ Q84030770 — distance from Earth (P2583): {'unit': 'http://www.wikidata.org/entity/Q12129', 'amount': '+346'}. The WIRED survey. II. Infrared excesses in the SDSS DR7 white dwarf catalog. wikidata.org.
[23] ↑ Q84030770 — SIMBAD ID (P3083): SDSS J153914.69+263710.8. wikidata.org.
[24] ↑ Q84030770 — right ascension (P6257): {'unit': 'http://www.wikidata.org/entity/Q28390', 'amount': '+234.81119183731010'}. Gaia Data Release 2. wikidata.org.
[25] ↑ Q84030770 — declination (P6258): {'unit': 'http://www.wikidata.org/entity/Q28390', 'amount': '+26.61965243794190'}. Gaia Data Release 2. wikidata.org.
[26] ↑ Q84030770 — epoch (P6259): J2000.0. Gaia Data Release 2. wikidata.org.

Class ancestry

[1] ↑ Q84030770 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). Q84030770. Retrieved May 7, 2026, from https://4ort.xyz/entity/q84030770

MLA “Q84030770.” 4ort.xyz Knowledge Graph, 4ort.xyz, 7 May. 2026, https://4ort.xyz/entity/q84030770.

BibTeX

@misc{4ortxyz_q84030770_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{Q84030770}}, year = {2026}, url = {https://4ort.xyz/entity/q84030770}, note = {Accessed: 2026-05-07}}

LLM prompt

According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): Q84030770 — https://4ort.xyz/entity/q84030770 (retrieved 2026-05-07)

Canonical URL: https://4ort.xyz/entity/q84030770 · Last refreshed: May 7, 2026