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public  Greenwich, UK Greenwich, UK  ⓘ
TimezoneEurope/London
Sunrise: 7:12 
Transit: 12:14 
Sunset: 17:16
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All Constellations »  Orion »  Deep Sky Objects » 

NGC 1642 - Spiral Galaxy in Orion

Above the horizon.  Rise: 12:54 | Tran: 18:56 | Set: 1:01
Alt: 39.08°   Az: 184.88°   Direction: South

NGC 1642 is a Spiral Galaxy in the Orion constellation. NGC 1642 is situated close to the celestial equator and, as such, it is at least partly visible from both hemispheres in certain times of the year. Given its B magnitude of 12.9, NGC 1642 is visible with the help of a telescope having an aperture of 10 inches (250mm) or more.

The image below is a photograph of NGC 1642 from the Digitized Sky Survey 2 (DSS2 - see the credits section) taken in the red channel. The area of sky represented in the image is 0.5000x0.5000 degrees (30.00x30.00 arcmins).

Image of NGC 1642 - Spiral Galaxy in Orion star
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DSS2 image of NGC 1642 in the Red band. The green region on the image is a representation of the major (1.66 arcmin) and minor (1.43 arcmin) axes of the object's apparent size.

Celestial Coordinates

Apparent

04h 44m 12s
+00° 39’ 51”
00h 15m 09s
04h 59m 21s

J2000

04h 42m 55s
+00° 37’ 06”

Finder Chart

The simplified sky charts below show the position of NGC 1642 in the sky. The first chart has a field of view of 60° while the second one has a field of view of 10°.

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Finder chart for NGC 1642 - Spiral Galaxy in Orion.

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Finder chart for NGC 1642 - Spiral Galaxy in Orion.

Photometric Information

The following table lists the magnitude of NGC 1642 in different bands of the electomagnetic spectrum (when available), from the B band (445nm wavelength, corresponding to the Blue color), to the V band ( 551nm wavelength, corresponding to Green/Yellow color), to the J, H, K bands (corresponding to 1220nm, 1630nm, 2190nm wavelengths respectively, which are colors not visible to the human eye).

12.9
10.56
9.89
9.57

For more information about photometry in astronomy, check the photometric system article on Wikipedia.

The surface brightess reported below is an indication of the brightness per unit of angular area of NGC 1642.

23.04 mag/arcsec2

Apparent Size

The following table reports NGC 1642 apparent angular size. The green area displayed on top of the DSS2 image of NGC 1642 is a visual representation of it.
1.66 arcmin
1.43 arcmin
151°

Morphological Classification

NGC 1642 - Spiral Galaxy in Orion is classified as Spiral (SAc) according to the Hubble and de Vaucouleurs galaxy morphological classification. The diagram below shows a visual representation of the position of NGC 1642 - Spiral Galaxy in Orion in the Hubble de Vaucouleurs sequence.

NGC 1642 - Spiral Galaxy in Orion
Visualization of the morphological classification of NGC 1642 - Spiral Galaxy in Orion, Spiral (SAc).
Credits for the background image: Antonio Ciccolella / M. De Leo / CC BY

Rise and Set Times

Location: Greenwich, UK
Latitude: 51° 28’ 47” N
Longitude: 0° 00’ 00” E
Timezone: Europe/London

Today's NGC 1642 - Spiral Galaxy in Orion rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 89.3°
Max altitude: 39.2°
Azimuth: 270.7°