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public LocationGreenwich, UK
TimezoneEurope/London
Sunrise: 4:57 
Transit: 13:04 
Sunset: 21:10
wb_twilight   (Civil Twilight)   What's Visible Now?
All Constellations »  Eridanus »  Deep Sky Objects » 

NGC 1638 - Lenticular Galaxy in Eridanus

Below the horizon.  Rise: 4:29 | Tran: 10:18 | Set: 16:07
Altitude: -39.2°   Azimuth: 343.4°   Direction: North-North-West

NGC 1638 is a Lenticular Galaxy in the Eridanus constellation. NGC 1638 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 12.6, NGC 1638 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 1638 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 1638 - Lenticular Galaxy in Eridanus star
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DSS2 image of NGC 1638 in the Red band. The green region on the image is a representation of the major (2.08 arcmin) and minor (1.26 arcmin) axes of the object's apparent size.

Apparent Coordinates

04h 42m 51s
-01° 45’ 49”

J2000 Coordinates

04h 41m 36s
-01° 48’ 33”

Finder Chart

The simplified sky charts below show the position of NGC 1638 in the sky. The first chart has a field of view of 60° while the second one has a field of view of 10°.

Finder chart NGC 1638 - Lenticular Galaxy in Eridanus star
Simplified finder chart for NGC 1638 - Lenticular Galaxy in Eridanus.

Finder chart NGC 1638 - Lenticular Galaxy in Eridanus star
Simplified finder chart for NGC 1638 - Lenticular Galaxy in Eridanus.

Photometric Information

The following table lists the magnitude of NGC 1638 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).

12.6
10.07
9.42
9.21

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 1638.

23.43 mag/arcsec2

Apparent Size

The following table reports NGC 1638 apparent angular size. The green area displayed on top of the DSS2 image of NGC 1638 is a visual representation of it.
2.08 arcmin
1.26 arcmin
67°

Morphological Classification

NGC 1638 - Lenticular Galaxy in Eridanus is classified as Lenticular (S0) according to the Hubble and de Vaucouleurs galaxy morphological classification. The diagram below shows a visual representation of the position of NGC 1638 - Lenticular Galaxy in Eridanus in the Hubble de Vaucouleurs sequence.

NGC 1638 - Lenticular Galaxy in Eridanus
Visualization of the morphological classification of NGC 1638 - Lenticular Galaxy in Eridanus, Lenticular (S0).
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 1638 - Lenticular Galaxy in Eridanus rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 91.8°
Max altitude: 36.7°
Azimuth: 268.2°