Eta Ursae Majoris

star in the constellation Ursa Major

Place high_proper_motion_star Q13093

Facts

21 properties

Identity

Instance of: high proper-motion star, navigational star, near-infrared source, ultraviolet source, star^[2]^[3]^[4]^[5]

More facts +20

Part of: Big Dipper^[8]
Absolute magnitude: 0.67
Apparent magnitude: 1.88 (0.99–2.41, n=9)
Catalog code: SAO 44752, 2MASS J13473244+4918477, GSC 03467-01257, HD 120315, HIP 67301, HR 5191, IRAS 13455+4933, η UMa, BD+50 2027, CEL 4281, CSV 101406, EUVE J1347+49.2, FK5 509, GC 18643, GCRV 8142, HIC 67301, IRC +50233, JP11 2433, N30 3141, NSV 6450, PLX 3147, PLX 3147.00, PMC 90-93 362, PPM 53742, RAFGL 4916S, ROT 1999, TD1 17067, TYC 3467-1257-1, UBV 12316, uvby98 100120315, HGAM 626, WEB 11841, 85 UMa, Gaia DR3 1510374147844219904, TIC 219033887, AG+49 1116, UBV M 19728^[9]^[10]^[11]^[12]^[13]^[14]^[15]^[16]^[17]^[18]^[19]^[20]^[21]^[22]^[23]
Constellation: Ursa Major^[6]
Declination: 49.313266729
Declination component of proper motion: -14.91
Described by source: Great Soviet Encyclopedia (1926–1947)
Diameter: 4730000.0
Distance from Earth: 100.0
Effective temperature: 17870.0
Epoch: J2000.0
Parallax: 31.38
Radial velocity: -13.4
Radius: 3.4
Right ascension: 206.885157342
Right ascension component of proper motion: -121.17
Spectral class: B3V^[7]
Stellar rotational velocity: 162.0
Surface gravity: 14800.0

🏷️ Also known as

en RAFGL 4916S en η Ursae Majoris en η UMa en The Twinkling Brilliance en SAO 44752 en ROT 1999 en 85 UMa en 85 Ursae Majoris en Alcaid en Alkaid en CEL 4281 en Eta Ursae Majoris en GCRV 8142 en HD 120315 en HGAM 626 en HIC 67301 en HIP 67301 en HR 5191 ar القائد da Eta Ursae Majoris

🔖 Identifiers · 10

Image (Wikimedia Commons): Ursa major star name.png ↗
De Agostini ID: Alkaid
Fandom article ID: memory-beta:Eta_Ursae_Majoris
Freebase ID: /m/057s61
Gaia ID: 1510374147844219904
Gran Enciclopèdia Catalana ID: alkaid
Gran Enciclopèdia Catalana ID (former scheme): 0002689, 0009108
Great Norwegian Encyclopedia ID: Alkaid
Online PWN Encyclopedia ID: 3867883
SIMBAD ID: * eta UMa

Report an error or request removal Lineage (PROV-JSON)

🔗 Connections

Belongs to 2

Big Dipper, Behenian fixed star

Instance of 2

star, navigational star

Constellation 1

Ursa Major

Epoch 1

J2000.0

Part of 1

Big Dipper

← DataTrek identifier 1

Toby Huss

← Depicts 1

flag of Alaska

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Summary

Eta Ursae Majoris is a high proper-motion star^[1].

References

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

Direct Wikidata claims

[2] ↑ Eta Ursae Majoris — instance of (P31): navigational star. wikidata.org.
[3] ↑ Eta Ursae Majoris — instance of (P31): near-infrared source. SIMBAD. wikidata.org.
[4] ↑ Eta Ursae Majoris — instance of (P31): ultraviolet source. SIMBAD. wikidata.org.
[5] ↑ Eta Ursae Majoris — instance of (P31): star. wikidata.org.
[6] ↑ Eta Ursae Majoris — constellation (P59): Ursa Major. wikidata.org.
[7] ↑ Eta Ursae Majoris — spectral class (P215): B3V. Spectral Classification. wikidata.org.
[8] ↑ Eta Ursae Majoris — part of (P361): Big Dipper. wikidata.org.
[9] ↑ Eta Ursae Majoris — catalog code (P528): SAO 44752. SIMBAD. wikidata.org.
[10] ↑ Eta Ursae Majoris — catalog code (P528): 2MASS J13473244+4918477. SIMBAD. wikidata.org.
[11] ↑ Eta Ursae Majoris — catalog code (P528): GSC 03467-01257. SIMBAD. wikidata.org.
[12] ↑ Eta Ursae Majoris — catalog code (P528): HD 120315. SIMBAD. wikidata.org.
[13] ↑ Eta Ursae Majoris — catalog code (P528): HIP 67301. SIMBAD. wikidata.org.
[14] ↑ Eta Ursae Majoris — catalog code (P528): HR 5191. SIMBAD. wikidata.org.
[15] ↑ Eta Ursae Majoris — catalog code (P528): IRAS 13455+4933. SIMBAD. wikidata.org.
[16] ↑ Eta Ursae Majoris — catalog code (P528): η UMa. wikidata.org.
[17] ↑ Eta Ursae Majoris — catalog code (P528): BD+50 2027. SIMBAD. wikidata.org.
[18] ↑ Eta Ursae Majoris — catalog code (P528): CEL 4281. SIMBAD. wikidata.org.
[19] ↑ Eta Ursae Majoris — catalog code (P528): CSV 101406. SIMBAD. wikidata.org.
[20] ↑ Eta Ursae Majoris — catalog code (P528): EUVE J1347+49.2. SIMBAD. wikidata.org.
[21] ↑ Eta Ursae Majoris — catalog code (P528): FK5 509. SIMBAD. wikidata.org.
[22] ↑ Eta Ursae Majoris — catalog code (P528): GC 18643. SIMBAD. wikidata.org.
[23] ↑ Eta Ursae Majoris — catalog code (P528): GCRV 8142. SIMBAD. wikidata.org.

Class ancestry

[1] ↑ Eta Ursae Majoris is an instance of high proper-motion star (Q2247863) [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). Eta Ursae Majoris. Retrieved November 4, 2026, from https://4ort.xyz/entity/eta-ursae-majoris

MLA “Eta Ursae Majoris.” 4ort.xyz Knowledge Graph, 4ort.xyz, 4 Nov. 2026, https://4ort.xyz/entity/eta-ursae-majoris.

BibTeX

@misc{4ortxyz_eta-ursae-majoris_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{Eta Ursae Majoris}}, year = {2026}, url = {https://4ort.xyz/entity/eta-ursae-majoris}, note = {Accessed: 2026-11-04}}

LLM prompt

According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): Eta Ursae Majoris — https://4ort.xyz/entity/eta-ursae-majoris (retrieved 2026-11-04)

Canonical URL: https://4ort.xyz/entity/eta-ursae-majoris · Last refreshed: November 4, 2026