NGC 6544
This article needs additional citations for verification. (December 2016) |
NGC 6544 | ||
---|---|---|
Distance 9450 light years | | |
Apparent magnitude (V) | 9 | |
Apparent dimensions (V) | 1' | |
Physical characteristics | ||
Other designations | Cr 366, GCl 87[1] | |
NGC 6544 is a small
Observation
NGC 6544 is located in the western part of the constellation, on the edge of a rich star field; its location is easily recoverable as it is located just 50' towards the southeast compared to the famous Lagoon Nebula. It can also be seen with 10×50mm binoculars as a small white spot like a misty star; with a telescope of 120mm and 100× magnification a few small stars may be resolved. Telescopes from 200mm up allow resolving of dozens of dim stars.
Because its
History of observations
NGC 6544 was observed for the first time by William Herschel in 1784,[2] who looked at it through his 18.4 inch reflector; he described it as a fairly bright and large object, circular and resolvable into stars; the New General Catalogue provides a similar description.
Characteristics
NGC 6544 is a globular cluster of medium density, estimated value of 5 on a scale between 1 and 12[
NGC 6544 has a
In 1999 a millisecond pulsar in a binary system was discovered within the cluster and cataloged as PSR J1807-2459.[4] There are a few notable variable stars that part of NGC 6544; a 1993 study focused on the region around NGC 6544 has identified some variable stars, of which only one is found to belong in storage: it is a RR Lyrae variable with a period of 0.57 days.
Note
- ^ "Results for NGC 6544". SIMBAD Astronomical Database. Retrieved 30 May 2013.
- ^ Seligman, Courtney. "New General Catalogue objects: NGC 6500 - 6549". cseligman.com. Retrieved 2021-09-11.
- S2CID 235313691. L11.
- doi:10.1086/318062.
References
- Tirion, Rappaport, Lovi, Uranometria 2000.0, William-Bell inc. ISBN 0-943396-15-8
- Robert Burnham, Jr, Burnham's Celestial Handbook: An observer's guide to the universe beyond the solar system, vol 3, p. 1556
External links