Messier Catalog
110 objects in the Messier catalog
Messier Catalog
Author
Charles Messier (1730-1817)
Year
1774-1781
Objekti
110
The Messier catalog is a set of 110 astronomical objects catalogued by French astronomer Charles Messier in his 'Catalog of Nebulae and Star Clusters' first published in 1774. The catalog was motivated by Messier's interest in finding comets, and includes some of the most spectacular deep-sky objects visible from the northern hemisphere, including galaxies, nebulae, and star clusters.
Data Sources
- OpenNGC Database - Modern comprehensive astronomical database
- AstroPixels Messier Catalog - Complete reference with observations and images
Objects are numbered M1 through M110, with some numbers (like M102) being controversial. This catalog remains one of the most popular targets for amateur astronomers.
Filtriraj objekte
| Ime | Vrsta | RA | Dek | Sjaj | Zviježđe | Akcije |
|---|
O podacima dubokog neba
Izvor podataka
Deep sky object data comes from the OpenNGC database by Mattia Verga. Coordinates, magnitudes, and object classifications are sourced from authoritative astronomical catalogs including NGC, IC, Messier, and Caldwell. Source repository: OpenNGC database
Fotometrijski sustavi
V-band (Visual): Johnson V filtar centriran na ~550nm (žuto-zeleno), odgovara vršnoj osjetljivosti oka. Ovo je standardni astronomski sustav magnitudа.
B-band (Blue): Johnson B filtar centriran na ~440nm (plavo svjetlo). Koristi se kada V magnituda nije dostupna.
Ljestvica sjaja
Astronomska ljestvica magnitudа je logaritamska. Svaki korak magnitude predstavlja omjer sjaja od ~2,512. Formula:
\[m_1 - m_2 = -2.5 \times \log_{10}\left(\frac{F_1}{F_2}\right)\]
gdje je m sjaj, a F tok. Niži sjaj = svjetliji objekt.
Indeks boje (B-V)
Indeks boje B-V označava boju i temperaturu objekta:
\[B - V = m_B - m_V\]
Typical values: blue objects have negative B-V, white objects are near 0, yellow objects are near 0.6, and red objects are above 1.0. Reference: Pretvorba boje
Oznaka sjaja
Svaka vrijednost magnitude označena je s (V) za V-pojas ili (B) za B-pojas kako bi se naznačio korišteni fotometrijski sustav.
Vodič vidljivosti:
• Granica golim okom: ~6,0 mag
• Dvogledi: ~10,0 mag
• Mali teleskop (4"): ~12,0 mag
• Srednji teleskop (8"): ~14,0 mag
Koordinatni sustav
Right Ascension (RA): Celestial longitude in hours:minutes:seconds (0h to 24h).
Declination (Dec): Celestial latitude in degrees:arcminutes:arcseconds (-90 to +90 degrees).
Sve koordinate su u epohi J2000.0 (standardni referentni okvir za godinu 2000).