M42 - Cl+N - Skylook.org

M42

Great Orion Nebula,Orion Nebula

Cl+N Orion Magnitud 4.0

Visibilidad actual

Altitud

40.0°

Acimut

149.5°

Good viewing conditions
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Detalles del objeto

Propiedad Valor

Rise/Set Times

Hora de salida

07:44

Hora de tránsito

13:26

Hora de puesta

19:08

Observing Recommendations

Equipment Needed:
Difficulty: Easy
Magnification: Moderate (75-150x)

Observing Tips:

  • Visible to the naked eye under dark skies
  • Great viewing conditions - fine detail should be visible

Acerca de los datos del cielo profundo

Data Sources

Deep sky object data is compiled from authoritative astronomical catalogs including NGC (New General Catalogue), IC (Index Catalogue), Messier, and Caldwell. Primary source: OpenNGC.

Coordinate Systems

Right Ascension (RA): Celestial longitude measured in hours, minutes, and seconds (0h to 24h).

Declination (Dec): Celestial latitude measured in degrees, arcminutes, and arcseconds (-90 to +90 degrees).

Escala de magnitud

The astronomical magnitude scale is logarithmic. Lower values = brighter objects. The formula relating magnitude difference to brightness ratio:

\[m_1 - m_2 = -2.5 \times \log_{10}\left(\frac{F_1}{F_2}\right)\]

where m is magnitude and F is flux.

Observing Recommendations

Recommendations are calculated based on:

  • Altitud: Objects above 30 degrees altitude are easier to observe
  • Magnitud: Brighter objects (lower magnitude) are easier to see
  • Fase lunar: Dark skies (new moon) improve visibility of faint objects

Rise and Set Times

Calculated using Skyfield astronomical library with observer's location and date. Times shown in local timezone. Objects are considered visible when altitude is above 0 degrees.

Best Viewing Time

Determined by finding when the object reaches maximum altitude (culmination) during nighttime hours. Calculated as:

\[t_{\text{best}} = \arg\max_{t \in \text{night}} h(t)\]

where h(t) is altitude as a function of time.