NGC 2360

NGC 2360
Ilustracja
NGC 2360 (SDSS)
Odkrywca

Caroline Herschel

Data odkrycia

26 lutego 1783

Dane obserwacyjne (J2000)
Gwiazdozbiór

Wielki Pies

Typ

otwarta, II2m

Rektascensja

07h 17m 43,1s

Deklinacja

–15° 38′ 29″

Odległość

6155 ly (1887 pc[1])

Jasność obserwowana

7,2 m

Rozmiar kątowy

14,0'

Alternatywne oznaczenia
OCL 589, Caldwell 58

NGC 2360 (również Gromada Caroline) – gromada otwarta znajdująca się w gwiazdozbiorze Wielkiego Psa. Odkryła ją Caroline Herschel 26 lutego 1783 roku[2]. Była to pierwsza gromada odkryta przez tę astronomkę, bywa nazywana jej imieniem[3].

Zbliżenie gromady na zdjęciu Kosmicznego Teleskopu Hubble’a

Gromada jest położona w odległości ok. 6,2 tys. lat świetlnych od Słońca[1].

Zobacz też

Przypisy

  1. ↑ a b Wilton Dias et al: Catalog of Optically Visible Open Clusters and Candidates. Departamento de Astronomia, 2014-05-24. [dostęp 2014-12-01].
  2. ↑ Courtney Seligman: NGC 2360. [w:] Celestial Atlas [on-line]. [dostęp 2014-12-01]. (ang.).
  3. ↑ Jesienne wyzwanie – śladami Caroline Herschel. Astrofan, 2020-10-29. [dostęp 2020-12-17]. (pol.).

Linki zewnętrzne

Media użyte na tej stronie

NGC2360 - SDSS DR14 (panorama).jpg
Autor: Sloan Digital Sky Survey, Licencja: CC BY 4.0
Color mapping
The sky image is obtained by Sloan Digital Sky Survey, DR14 with SciServer.

Angle of view: 27' × 27' (0.792" per pixel), north is up.

Details on the image processing pipeline: https://www.sdss.org/dr14/imaging/jpg-images-on-skyserver/
Caldwell 58 (50193004227).jpg
Autor: NASA Hubble Space Telescope, Licencja: CC BY 2.0

Caldwell 58, also known as NGC 2360 or Caroline’s Cluster, was discovered by and named after the German astronomer Caroline Herschel in 1783. The younger sister of famed astronomer William Herschel, Caroline was the first woman to win the prestigious Gold Medal of the Royal Astronomical Society. She earned this award for her work verifying her brother’s astronomical observations and compiling a catalog of nebulae to aid other astronomers.

Caldwell 58 is an open cluster — a group of stars loosely bound together by gravity. It is located in the constellation Canis Major, roughly 3,700 light-years from Earth. The cluster has an apparent magnitude of 7.2 and can be spotted with a pair of binoculars in dark, moonless skies.

Caldwell 58 is most easily observed during the Northern Hemisphere’s winter and the Southern Hemisphere’s summer.

Astronomers used Hubble to study white dwarfs in Caldwell 58 and better understand the age of our galaxy. After a Sun-like star has exhausted its supply of nuclear fuel and ejected its outer layers of gas, what is left behind is the hot core of the star — a white dwarf. These objects cool over a period of billions of years and are some of the oldest stars in our galaxy. Some white dwarfs pulse regularly as they cool. The time between these pulsations changes over the white dwarf’s lifetime, so the time between pulses can be used to estimate how quickly the white dwarf is cooling, and thus how long it has been cooling. This information is useful to astronomers because it means pulsating white dwarfs can be used as chronometers, or “clocks,” that constrain the age of our galaxy. These observations of Caldwell 58 were made with Hubble’s Advanced Camera for Surveys to help astronomers calibrate white-dwarf chronometers.

Credit: NASA, ESA, and T. von Hippel (Embry-Riddle Aeronautical University); Processing: Gladys Kober (NASA/Catholic University of America)

For Hubble's Caldwell catalog website and information on how to find these objects in the night sky, visit: <a href="https://www.nasa.gov/content/goddard/hubble-s-caldwell-catalog" rel="noreferrer nofollow">www.nasa.gov/content/goddard/hubble-s-caldwell-catalog</a>