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Parameters
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Positional Parameters
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| cluster | NGC 6626 |
| name | M 28 |
| RA | 18 24 32. |
| Declination | -24 52 12 |
| Galactic longitude | 7.8 |
| Galactic latitude | -5.58 |
| R sun | 5.6 |
| R gc | 2.7 |
| X | 5.5 |
| Y | 0.8 |
| Z | -0.5 |
| Photometric Parameters | | E (B-V) | 0.4 |
| V HB | 15.55 |
| (m-M) | 14.97 |
| Vt | 6.79 |
| MVt | -8.33 |
| (U-B) | 0.46 |
| (B-V) | 1.08 |
| (V-R) | 0.69 |
| (V-I) | 1.41 |
| S_RR | 5.4 |
| HBR | 0.9 |
| hbt | 2 |
| Structural Parameters | [Fe / H] | -1.45 |
| SpT | F8 |
| v_r | 17 |
| err | 1 |
| v_LSR | 28.5 |
| c | 1.67 |
| r_c | 0.24 |
| r_h | 1.56 |
| r_t | 11.27 |
| lg(tc) | 7.62 |
| lg(th) | 9.04 |
| mu_V | 16.08 |
| rho_v | 4.75 |
| Color-magnitude diagrams |
| author | Testa, Vincenzo; Corsi, Carlo E.; Andreuzzi, Gloria; Iannicola, Giacinto;
Marconi, Gianni; Piersimoni, Anna Marina; Buonanno Roberto | | title | Horizontal-Branch Morphology and Dense Environments:
Hubble Space Telescope Observations of Globular Clusters NGC 2298, 5897, 6535, and 6626 |
| journal | The Astronomical Journal, Volume 121, Issue 2, pp. 916-934 (2001) |
| CM diagram |  |
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| Description of NGC 6626 |
Messier 28 (also known as M28 or NGC 6626) is a globular cluster in the constellation Sagittarius. It was discovered by Charles Messier in 1764.
M28 is at a distance of about 18,000 to 19,000 light-years away from Earth. 18 RR Lyrae type variable stars have been observed in this cluster. In 1986, M28 became the first globular cluster where a millisecond pulsar was discovered (by the Lovell Telescope at Jodrell Bank Observatory).
Source: Wikipedia | Notify inaccuracies |
| DSS image |
Image of the cluster from the Digital Sky Survey |
Other Resources
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NGC 6626 |
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ADS "Object Search"
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| Web Links for this cluster
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(0 comments in the database at the moment) | Selected biblio  | | Paper n. 1 |
Testa, Vincenzo; Corsi, Carlo E.; Andreuzzi, Gloria; Iannicola, Giacinto;
Marconi, Gianni; Piersimoni, Anna Marina; Buonanno Roberto
Horizontal-Branch Morphology and Dense Environments:
Hubble Space Telescope Observations of Globular Clusters NGC 2298, 5897, 6535, and 6626
The Astronomical Journal, Volume 121, Issue 2, pp. 916-934 (2001)
(NGC 6626 cmd ) | | See all items
(1 paper) |
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