Q222618

Thing brown_dwarf Q222618

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Q222618

Summary

Q222618 is a brown dwarf^[1].

Key Facts

Q222618's instance of is recorded as brown dwarf^[2].
Q222618's constellation is recorded as Serpens^[3].
Q222618's spectral class is recorded as T0:^[4].
Q222618's spectral class is recorded as L7.5+T2.5^[5].
Q222618's spectral class is recorded as L9.5^[6].
Q222618's catalog code is recorded as 2MASS J15160303+0259292^[7].
Q222618's catalog code is recorded as SDSS J151603.02+025928.9^[8].
Q222618's catalog code is recorded as SDSS J151603.03+025928.9^[9].
Q222618's catalog code is recorded as ULAS J151603.00+025927.7^[10].
Q222618's catalog code is recorded as BRLT 281^[11].
Q222618's apparent magnitude is recorded as {'unit': '1', 'amount': '+17.230'}^[12].
Q222618's apparent magnitude is recorded as {'unit': '1', 'amount': '+15.997'}^[13].
Q222618's apparent magnitude is recorded as {'unit': '1', 'amount': '+15.433'}^[14].
Q222618's apparent magnitude is recorded as {'unit': '1', 'amount': '+25.728'}^[15].
Q222618's apparent magnitude is recorded as {'unit': '1', 'amount': '+24.246'}^[16].
Q222618's apparent magnitude is recorded as {'unit': '1', 'amount': '+23.615'}^[17].
Q222618's apparent magnitude is recorded as {'unit': '1', 'amount': '+23.106'}^[18].
Q222618's apparent magnitude is recorded as {'unit': '1', 'amount': '+19.599'}^[19].
Q222618's apparent magnitude is recorded as {'unit': '1', 'amount': '+16.075'}^[20].
Q222618's apparent magnitude is recorded as {'unit': '1', 'amount': '+15.437'}^[21].
Q222618's apparent magnitude is recorded as {'unit': '1', 'amount': '+16.88'}^[22].
Q222618's apparent magnitude is recorded as {'unit': '1', 'amount': '+22.63'}^[23].
Q222618's apparent magnitude is recorded as {'unit': '1', 'amount': '+19.18'}^[24].
Q222618's distance from Earth is recorded as {'unit': 'http://www.wikidata.org/entity/Q12129', 'amount': '+26'}^[25].
Q222618's right ascension is recorded as {'unit': 'http://www.wikidata.org/entity/Q28390', 'amount': '+229.012667'}^[26].

Body

Definition and Type

Q222618's instance of is recorded as brown dwarf^[2].

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Quick Facts

Instance of brown dwarf

Properties

Apparent magnitude unit: 1, amount: +17.230, unit: 1, amount: +15.997, unit: 1, amount: +15.433, unit: 1, amount: +25.728, unit: 1, amount: +24.246, unit: 1, amount: +23.615, unit: 1, amount: +23.106, unit: 1, amount: +19.599, unit: 1, amount: +16.075, unit: 1, amount: +15.437, unit: 1, amount: +16.88, unit: 1, amount: +22.63, unit: 1, amount: +19.18

Catalog code 2MASS J15160303+0259292, SDSS J151603.02+025928.9, SDSS J151603.03+025928.9, ULAS J151603.00+025927.7, BRLT 281

Constellation Serpens

Declination unit: www.wikidata.org, amount: +2.991472, unit: www.wikidata.org, amount: +2.9910389

Declination component of proper motion unit: www.wikidata.org, amount: -174

Distance from earth unit: www.wikidata.org, amount: +26

Epoch J2000.0

Imported from wholeness_audit_2026-05-02_v2

Right ascension unit: www.wikidata.org, amount: +229.012667, unit: www.wikidata.org, amount: +229.0125125

Right ascension component of proper motion unit: www.wikidata.org, amount: -48

Spectral class T0:, L7.5+T2.5, L9.5

External References (1)

Simbad id 2MASS J15160303+0259292

References

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

Direct Wikidata claims

[2] ↑ Q222618 — instance of (P31): brown dwarf. SIMBAD. wikidata.org.
[3] ↑ Q222618 — constellation (P59): Serpens. wikidata.org.
[4] ↑ Q222618 — spectral class (P215): T0:. SpeX SPECTROSCOPY OF UNRESOLVED VERY LOW MASS BINARIES. I. IDENTIFICATION OF 17 CANDIDATE BINARIES STRADDLING THE L DWARF/T DWARF TRANSITION. wikidata.org.
[5] ↑ Q222618 — spectral class (P215): L7.5+T2.5. SpeX SPECTROSCOPY OF UNRESOLVED VERY LOW MASS BINARIES. I. IDENTIFICATION OF 17 CANDIDATE BINARIES STRADDLING THE L DWARF/T DWARF TRANSITION. wikidata.org.
[6] ↑ Q222618 — spectral class (P215): L9.5. SpeX SPECTROSCOPY OF UNRESOLVED VERY LOW MASS BINARIES. I. IDENTIFICATION OF 17 CANDIDATE BINARIES STRADDLING THE L DWARF/T DWARF TRANSITION. wikidata.org.
[7] ↑ Q222618 — catalog code (P528): 2MASS J15160303+0259292. SIMBAD. wikidata.org.
[8] ↑ Q222618 — catalog code (P528): SDSS J151603.02+025928.9. SIMBAD. wikidata.org.
[9] ↑ Q222618 — catalog code (P528): SDSS J151603.03+025928.9. SIMBAD. wikidata.org.
[10] ↑ Q222618 — catalog code (P528): ULAS J151603.00+025927.7. SIMBAD. wikidata.org.
[11] ↑ Q222618 — catalog code (P528): BRLT 281. SIMBAD. wikidata.org.
[12] ↑ Q222618 — apparent magnitude (P1215): {'unit': '1', 'amount': '+17.230'}. VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003). wikidata.org.
[13] ↑ Q222618 — apparent magnitude (P1215): {'unit': '1', 'amount': '+15.997'}. VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003). wikidata.org.
[14] ↑ Q222618 — apparent magnitude (P1215): {'unit': '1', 'amount': '+15.433'}. VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003). wikidata.org.
[15] ↑ Q222618 — apparent magnitude (P1215): {'unit': '1', 'amount': '+25.728'}. The Sixth Data Release of the Sloan Digital Sky Survey. wikidata.org.
[16] ↑ Q222618 — apparent magnitude (P1215): {'unit': '1', 'amount': '+24.246'}. The Sixth Data Release of the Sloan Digital Sky Survey. wikidata.org.
[17] ↑ Q222618 — apparent magnitude (P1215): {'unit': '1', 'amount': '+23.615'}. The Sixth Data Release of the Sloan Digital Sky Survey. wikidata.org.
[18] ↑ Q222618 — apparent magnitude (P1215): {'unit': '1', 'amount': '+23.106'}. The Sixth Data Release of the Sloan Digital Sky Survey. wikidata.org.
[19] ↑ Q222618 — apparent magnitude (P1215): {'unit': '1', 'amount': '+19.599'}. The Sixth Data Release of the Sloan Digital Sky Survey. wikidata.org.
[20] ↑ Q222618 — apparent magnitude (P1215): {'unit': '1', 'amount': '+16.075'}. UKIRT Infrared Deep Sky Survey (UKIDSS) Release 9. wikidata.org.
[21] ↑ Q222618 — apparent magnitude (P1215): {'unit': '1', 'amount': '+15.437'}. UKIRT Infrared Deep Sky Survey (UKIDSS) Release 9. wikidata.org.
[22] ↑ Q222618 — apparent magnitude (P1215): {'unit': '1', 'amount': '+16.88'}. Photometric brown-dwarf classification. II. A homogeneous sample of 1361 L and T dwarfs brighter than J = 17.5 with accurate spectral types. wikidata.org.
[23] ↑ Q222618 — apparent magnitude (P1215): {'unit': '1', 'amount': '+22.63'}. Photometric brown-dwarf classification. II. A homogeneous sample of 1361 L and T dwarfs brighter than J = 17.5 with accurate spectral types. wikidata.org.
[24] ↑ Q222618 — apparent magnitude (P1215): {'unit': '1', 'amount': '+19.18'}. Photometric brown-dwarf classification. II. A homogeneous sample of 1361 L and T dwarfs brighter than J = 17.5 with accurate spectral types. wikidata.org.
[25] ↑ Q222618 — distance from Earth (P2583): {'unit': 'http://www.wikidata.org/entity/Q12129', 'amount': '+26'}. The brown dwarf kinematics project I. Proper motions and tangential velocities for a large sample of late-type M, L, and T dwarfs. wikidata.org.
[26] ↑ Q222618 — right ascension (P6257): {'unit': 'http://www.wikidata.org/entity/Q28390', 'amount': '+229.012667'}. VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003). wikidata.org.

Class ancestry

[1] ↑ Q222618 is an instance of brown dwarf (Q101600) [P31, primary]. Wikidata. wikidata.org.

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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). Q222618. Retrieved May 7, 2026, from https://4ort.xyz/entity/q222618

MLA “Q222618.” 4ort.xyz Knowledge Graph, 4ort.xyz, 7 May. 2026, https://4ort.xyz/entity/q222618.

BibTeX

@misc{4ortxyz_q222618_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{Q222618}}, year = {2026}, url = {https://4ort.xyz/entity/q222618}, note = {Accessed: 2026-05-07}}

LLM prompt

According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): Q222618 — https://4ort.xyz/entity/q222618 (retrieved 2026-05-07)

Canonical URL: https://4ort.xyz/entity/q222618 · Last refreshed: May 7, 2026