Arp-Madore 1 | |
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![]() Globular cluster Arp-Madore 1 | |
Observation data ( J2000.0 epoch) | |
Constellation | Horologium |
Right ascension | 03h 55m 02.70s [1] |
Declination | −49° 36′ 52.0″ [1] |
Distance | 398,000 (122,000) |
Apparent magnitude (V) | 15.07 |
Apparent dimensions (V) | 1.288 by 0.691 ′ [1] |
Physical characteristics | |
Other designations | E1, AM 0353-094, C 0353-497, C 0354-498, AM 1, ESO 201-10, LEDA 14098, SGC 035336-4945.6 [1] |
Arp-Madore 1 (also known as AM 1) is a globular cluster visible in the constellation Horologium, located 123.3 kiloparsecs (402,000 light-years) away from Earth. [2] It is one of the most distant known globular clusters of the Milky Way galaxy's halo; [3] [4] its distance gives it interest as a test case for gravitational theories. [5] AM 1 has a visual magnitude of 15.07. [6]
It is named after Halton Arp and Barry F. Madore, who identified it as a distant globular cluster in 1979, using the UK Schmidt Telescope, [7] after previous researchers at the European Southern Observatory had observed its existence but not its classification. [8]
Arp-Madore 1 | |
---|---|
![]() Globular cluster Arp-Madore 1 | |
Observation data ( J2000.0 epoch) | |
Constellation | Horologium |
Right ascension | 03h 55m 02.70s [1] |
Declination | −49° 36′ 52.0″ [1] |
Distance | 398,000 (122,000) |
Apparent magnitude (V) | 15.07 |
Apparent dimensions (V) | 1.288 by 0.691 ′ [1] |
Physical characteristics | |
Other designations | E1, AM 0353-094, C 0353-497, C 0354-498, AM 1, ESO 201-10, LEDA 14098, SGC 035336-4945.6 [1] |
Arp-Madore 1 (also known as AM 1) is a globular cluster visible in the constellation Horologium, located 123.3 kiloparsecs (402,000 light-years) away from Earth. [2] It is one of the most distant known globular clusters of the Milky Way galaxy's halo; [3] [4] its distance gives it interest as a test case for gravitational theories. [5] AM 1 has a visual magnitude of 15.07. [6]
It is named after Halton Arp and Barry F. Madore, who identified it as a distant globular cluster in 1979, using the UK Schmidt Telescope, [7] after previous researchers at the European Southern Observatory had observed its existence but not its classification. [8]