Q84128738

white dwarf in the constellation Ursa Major

Thing white_dwarf Q84128738

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Q84128738

Summary

Q84128738 is a white dwarf^[1].

Key Facts

Q84128738's instance of is recorded as white dwarf^[2].
Q84128738's constellation is recorded as Ursa Major^[3].
Q84128738's spectral class is recorded as D^[4].
Q84128738's catalog code is recorded as PB 302^[5].
Q84128738's catalog code is recorded as SDSS J103008.33+393715.4^[6].
Q84128738's catalog code is recorded as [HHD2009] SDSS J1030+3937^[7].
Q84128738's catalog code is recorded as [SHW2006] J103008.34+393715.4^[8].
Q84128738's catalog code is recorded as [SLH2007] J103008.34+393715.5^[9].
Q84128738's catalog code is recorded as [RGS2010] J103008.34+393715.4^[10].
Q84128738's catalog code is recorded as SDSS J103008.34+393715.5^[11].
Q84128738's catalog code is recorded as WIRED J103008.34+393715.4^[12].
Q84128738's catalog code is recorded as WD 1027+398^[13].
Q84128738's catalog code is recorded as Gaia DR2 756150707815989632^[14].
Q84128738's redshift is recorded as {'unit': '1', 'amount': '+0.00022'}^[15].
Q84128738's apparent magnitude is recorded as {'unit': '1', 'amount': '+18.5'}^[16].
Q84128738's apparent magnitude is recorded as {'unit': '1', 'amount': '+18.663'}^[17].
Q84128738's apparent magnitude is recorded as {'unit': '1', 'amount': '+19.076'}^[18].
Q84128738's apparent magnitude is recorded as {'unit': '1', 'amount': '+19.041'}^[19].
Q84128738's apparent magnitude is recorded as {'unit': '1', 'amount': '+18.784'}^[20].
Q84128738's apparent magnitude is recorded as {'unit': '1', 'amount': '+18.706'}^[21].
Q84128738's apparent magnitude is recorded as {'unit': '1', 'amount': '+18.8389'}^[22].
Q84128738's parallax is recorded as {'unit': 'http://www.wikidata.org/entity/Q21500224', 'amount': '+1.2431'}^[23].
Q84128738's radial velocity is recorded as {'unit': 'http://www.wikidata.org/entity/Q3674704', 'amount': '+66'}^[24].
Q84128738's metallicity is recorded as {'unit': '1', 'amount': '+0.3'}^[25].
Q84128738's distance from Earth is recorded as {'unit': 'http://www.wikidata.org/entity/Q12129', 'amount': '+820'}^[26].

Body

Definition and Type

Q84128738's instance of is recorded as white dwarf^[2].

⭐ Popularity Graph

0/100 established

Quick Facts

Instance of white dwarf

Properties

Apparent magnitude unit: 1, amount: +18.5, unit: 1, amount: +18.663, unit: 1, amount: +19.076, unit: 1, amount: +19.041, unit: 1, amount: +18.784, unit: 1, amount: +18.706, unit: 1, amount: +18.8389

Catalog code PB 302, SDSS J103008.33+393715.4, [HHD2009] SDSS J1030+3937, [SHW2006] J103008.34+393715.4, [SLH2007] J103008.34+393715.5, [RGS2010] J103008.34+393715.4, SDSS J103008.34+393715.5, WIRED J103008.34+393715.4, WD 1027+398, Gaia DR2 756150707815989632

Constellation Ursa Major

Declination unit: www.wikidata.org, amount: +39.62099154863470

Declination component of proper motion unit: www.wikidata.org, amount: -33.131

Distance from earth unit: www.wikidata.org, amount: +820

Effective temperature unit: www.wikidata.org, amount: +20913

Epoch J2000.0

Imported from wholeness_audit_2026-05-02_v2

Metallicity unit: 1, amount: +0.3

Parallax unit: www.wikidata.org, amount: +1.2431

Radial velocity unit: www.wikidata.org, amount: +66

Redshift unit: 1, amount: +0.00022

Right ascension unit: www.wikidata.org, amount: +157.53473317785680

Right ascension component of proper motion unit: www.wikidata.org, amount: +14.215

Spectral class D

Surface gravity unit: www.wikidata.org, amount: +34000000

External References (2)

Gaia id 756150707815989632

Simbad id PB 302

References

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

Direct Wikidata claims

[2] ↑ Q84128738 — instance of (P31): white dwarf. SIMBAD. wikidata.org.
[3] ↑ Q84128738 — constellation (P59): Ursa Major. wikidata.org.
[4] ↑ Q84128738 — spectral class (P215): D. A photometric selection of white dwarf candidates in Sloan Digital Sky Survey Data Release 10. wikidata.org.
[5] ↑ Q84128738 — catalog code (P528): PB 302. SIMBAD. wikidata.org.
[6] ↑ Q84128738 — catalog code (P528): SDSS J103008.33+393715.4. SIMBAD. wikidata.org.
[7] ↑ Q84128738 — catalog code (P528): [HHD2009] SDSS J1030+3937. SIMBAD. wikidata.org.
[8] ↑ Q84128738 — catalog code (P528): [SHW2006] J103008.34+393715.4. SIMBAD. wikidata.org.
[9] ↑ Q84128738 — catalog code (P528): [SLH2007] J103008.34+393715.5. SIMBAD. wikidata.org.
[10] ↑ Q84128738 — catalog code (P528): [RGS2010] J103008.34+393715.4. SIMBAD. wikidata.org.
[11] ↑ Q84128738 — catalog code (P528): SDSS J103008.34+393715.5. SIMBAD. wikidata.org.
[12] ↑ Q84128738 — catalog code (P528): WIRED J103008.34+393715.4. SIMBAD. wikidata.org.
[13] ↑ Q84128738 — catalog code (P528): WD 1027+398. SIMBAD. wikidata.org.
[14] ↑ Q84128738 — catalog code (P528): Gaia DR2 756150707815989632. SIMBAD. wikidata.org.
[15] ↑ Q84128738 — redshift (P1090): {'unit': '1', 'amount': '+0.00022'}. The Sixth Data Release of the Sloan Digital Sky Survey. wikidata.org.
[16] ↑ Q84128738 — apparent magnitude (P1215): {'unit': '1', 'amount': '+18.5'}. SIMBAD. wikidata.org.
[17] ↑ Q84128738 — apparent magnitude (P1215): {'unit': '1', 'amount': '+18.663'}. The Sixth Data Release of the Sloan Digital Sky Survey. wikidata.org.
[18] ↑ Q84128738 — apparent magnitude (P1215): {'unit': '1', 'amount': '+19.076'}. The Sixth Data Release of the Sloan Digital Sky Survey. wikidata.org.
[19] ↑ Q84128738 — apparent magnitude (P1215): {'unit': '1', 'amount': '+19.041'}. The Sixth Data Release of the Sloan Digital Sky Survey. wikidata.org.
[20] ↑ Q84128738 — apparent magnitude (P1215): {'unit': '1', 'amount': '+18.784'}. The Sixth Data Release of the Sloan Digital Sky Survey. wikidata.org.
[21] ↑ Q84128738 — apparent magnitude (P1215): {'unit': '1', 'amount': '+18.706'}. The SDSS Photometric Catalog, Release 7. wikidata.org.
[22] ↑ Q84128738 — apparent magnitude (P1215): {'unit': '1', 'amount': '+18.8389'}. Gaia Data Release 2. wikidata.org.
[23] ↑ Q84128738 — parallax (P2214): {'unit': 'http://www.wikidata.org/entity/Q21500224', 'amount': '+1.2431'}. Gaia Data Release 2. wikidata.org.
[24] ↑ Q84128738 — radial velocity (P2216): {'unit': 'http://www.wikidata.org/entity/Q3674704', 'amount': '+66'}. The Sixth Data Release of the Sloan Digital Sky Survey. wikidata.org.
[25] ↑ Q84128738 — metallicity (P2227): {'unit': '1', 'amount': '+0.3'}. Spectral analysis of 636 white dwarf-M star binaries from the Sloan Digital Sky Survey. wikidata.org.
[26] ↑ Q84128738 — distance from Earth (P2583): {'unit': 'http://www.wikidata.org/entity/Q12129', 'amount': '+820'}. The WIRED survey. II. Infrared excesses in the SDSS DR7 white dwarf catalog. wikidata.org.

Class ancestry

[1] ↑ Q84128738 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). Q84128738. Retrieved May 7, 2026, from https://4ort.xyz/entity/q84128738

MLA “Q84128738.” 4ort.xyz Knowledge Graph, 4ort.xyz, 7 May. 2026, https://4ort.xyz/entity/q84128738.

BibTeX

@misc{4ortxyz_q84128738_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{Q84128738}}, year = {2026}, url = {https://4ort.xyz/entity/q84128738}, note = {Accessed: 2026-05-07}}

LLM prompt

According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): Q84128738 — https://4ort.xyz/entity/q84128738 (retrieved 2026-05-07)

Canonical URL: https://4ort.xyz/entity/q84128738 · Last refreshed: May 7, 2026