Katalog Palomar
Katalog Palomar – katalog astronomiczny zawierający 15 gromad kulistych odkrytych w programie Palomar Observatory Sky Survey w latach 50. XX wieku.
Kilka gromad kulistych Palomar, w tym Palomar 6, Palomar 7, Palomar 9, Palomar 10 i Palomar 11, jest w znacznym stopniu przesłoniętych przez pył naszej Galaktyki. Inne, w tym Palomar 3, Palomar 4 i Palomar 14, to olbrzymie gromady kuliste znajdujące się bardzo daleko na granicy zewnętrznego halo Drogi Mlecznej. Obiekty te są również bardzo zróżnicowane pod względem stopnia trudności obserwacji, od łatwych do prawie niemożliwych dla astronomii amatorskiej.
Dane obserwacyjne
| Obiekt | Gwiazdozbiór | Rektascensja (J2000)[1] | Deklinacja (J2000)[1] | Wielkość gwiazdowa gromady[1] | Wielkość gwiazdowa najjaśniejszych gwiazd[1] | Rozmiar kątowy[1] |
|---|---|---|---|---|---|---|
| Palomar 1 | Cefeusz | 03h 33m 23,0s | +79° 34′ 50″ | 13,6 | 16,3 | 2,8' |
| Palomar 2 | Woźnica | 04h 46m 05,8s | 31° 22′ 55″ | 13,0 | 18,8 | 2,2' |
| Palomar 3 | Sekstant | 10h 05m 31,4s | 00° 04′ 17″ | 13,9 | 18,0 | 1,6' |
| Palomar 4 | Wielka Niedźwiedzica | 11h 29m 16,8s | 28° 58′ 25″ | 14,2 | 18,0 | 1,3' |
| Palomar 5 | Wąż | 15h 16m 05,3s | -00° 06′ 41″ | 11,8 | 15,5 | 8,0' |
| Palomar 6 | Wężownik | 17h 43m 42,2s | 26° 13′ 21″ | 11,6 | b. d. | 1,2' |
| Palomar 7 | Wąż | 18h 10m 44,2s | -07° 12′ 27″ | 10,3 | 15,7 | 8,0' |
| Palomar 8 | Strzelec | 18h 41m 29,9s | -19° 49′ 33″ | 10,9 | 15,4 | 5,2' |
| Palomar 9 | Strzelec | 18h 55m 06,0s | -22° 42′ 06″ | 8,4 | 14,0 | 5,4' |
| Palomar 10 | Strzała | 19h 18m 02,1s | +18° 34′ 18″ | 13,2 | 18,0 | 4,0' |
| Palomar 11 | Orzeł | 19h 45m 14,4s | -08° 00′ 26″ | 9,8 | b. d. | 10,0' |
| Palomar 12 | Koziorożec | 21h 46m 38,8s | -21° 15′ 03″ | 11,7 | 14,6 | 2,9' |
| Palomar 13 | Pegaz | 23h 06m 44,4s | +12° 46′ 19″ | 13,8 | 17,0 | 0,7' |
| Palomar 14 | Herkules | 16h 11m 04,9s | +14° 57′ 29″ | 14,7 | 17,6 | 2,5' |
| Palomar 15 | Wężownik | 16h 59m 51s | -00° 32′ 31″ | 14,2 | 17,1 | 3,0' |
Przypisy
Linki zewnętrzne
- Katalog Palomar (ang.)
Media użyte na tej stronie
This is a mosaic image, one of the largest ever taken by NASA's Hubble Space Telescope, of the Crab Nebula, a six-light-year-wide expanding remnant of a star's supernova explosion. Japanese and Chinese astronomers recorded this violent event in 1054 CE, as did, almost certainly, Native Americans.
The orange filaments are the tattered remains of the star and consist mostly of hydrogen. The rapidly spinning neutron star embedded in the center of the nebula is the dynamo powering the nebula's eerie interior bluish glow. The blue light comes from electrons whirling at nearly the speed of light around magnetic field lines from the neutron star. The neutron star, like a lighthouse, ejects twin beams of radiation that appear to pulse 30 times a second due to the neutron star's rotation. A neutron star is the crushed ultra-dense core of the exploded star.
The Crab Nebula derived its name from its appearance in a drawing made by Irish astronomer Lord Rosse in 1844, using a 36-inch telescope. When viewed by Hubble, as well as by large ground-based telescopes such as the European Southern Observatory's Very Large Telescope, the Crab Nebula takes on a more detailed appearance that yields clues into the spectacular demise of a star, 6,500 light-years away.
The newly composed image was assembled from 24 individual Wide Field and Planetary Camera 2 exposures taken in October 1999, January 2000, and December 2000. The colors in the image indicate the different elements that were expelled during the explosion. Blue in the filaments in the outer part of the nebula represents neutral oxygen, green is singly-ionized sulfur, and red indicates doubly-ionized oxygen.Globular cluster en:Palomar 12 by Hubble Space Telescope 3.36′ view, North is 27° counterclockwise