Westerlund 1

Summary

Westerlund 1 is an open cluster^[1]. It draws 63 Wikipedia views per month (open_cluster category, ranking #15 of 108).^[2]

Key Facts

• Westerlund 1 is credited with the discovery of Bengt Westerlund^[3].
• Westerlund 1's image is recorded as Westerlund 1.jpg^[4].
• Westerlund 1's instance of is recorded as open cluster^[5].
• Westerlund 1's constellation is recorded as Ara^[6].
• Westerlund 1's spectral class is recorded as O...^[7].
• Westerlund 1's Commons category is recorded as Westerlund 1^[8].
• Westerlund 1's catalog code is recorded as ESO 277-12^[9].
• Westerlund 1's catalog code is recorded as C 1644-457^[10].
• Westerlund 1's time of discovery or invention is recorded as +1961-00-00T00:00:00Z^[11].
• Westerlund 1's Freebase ID is recorded as /m/025v6yx^[12].
• Westerlund 1's SIMBAD ID is recorded as Cl Westerlund 1^[13].
• Westerlund 1's right ascension is recorded as {'unit': 'Q28390', 'amount': '+251.766667'}^[14].
• Westerlund 1's declination is recorded as {'unit': 'Q28390', 'amount': '-45.851361'}^[15].
• Westerlund 1's epoch is recorded as J2000.0^[16].
• Westerlund 1's declination component of proper motion is recorded as {'unit': 'Q22137107', 'amount': '-10.01'}^[17].
• Westerlund 1's right ascension component of proper motion is recorded as {'unit': 'Q22137107', 'amount': '-4.50'}^[18].

Body

Designation and Status

Westerlund 1's instance of is recorded as open cluster^[5].

History and Context

Catalog codes include ESO 277-12^[9] and C 1644-457^[10].

Why It Matters

Westerlund 1 draws 63 Wikipedia views per month (open_cluster category, ranking #15 of 108).^[2] It has Wikipedia articles in 15 language editions, a strong signal of global cultural recognition.^[19] It is known by 7 alternative names across languages and contexts.^[20]