NGC 491A - Spiral Galaxy in Sculptor
NGC 491A is a Spiral Galaxy in the Sculptor constellation. NGC 491A is situated south of the celestial equator and, as such, it is more easily visible from the southern hemisphere.
The image below is a photograph of NGC 491A 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 0.5x0.5 degrees (30x30 arcmins).
Key facts about NGC 491A
NGC 491A is above the horizon from Greenwich, United Kingdom.
Altitude: 1.1°
Azimuth: 156.8°
Direction: South-South-East
See also NGC 491A rise and set times.
Given its B magnitude of 14.32, NGC 491A is visible with the help of a telescope having an aperture of 14 inches (350mm) or more.
Photometric information of NGC 491A
The following table lists the magnitude of NGC 491A 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).
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 491A.
Apparent size of NGC 491A
The following table reports NGC 491A apparent angular size. The green area displayed on top of the DSS2 image of NGC 491A is a visual representation of it.NGC 491A - Spiral Galaxy in Sculptor morphological classification
NGC 491A - Spiral Galaxy in Sculptor is classified as Spiral (SAcd) according to the Hubble and de Vaucouleurs galaxy morphological classification. The diagram below shows a visual representation of the position of NGC 491A - Spiral Galaxy in Sculptor in the Hubble de Vaucouleurs sequence.
Credits for the background image: Antonio Ciccolella / M. De Leo / CC BY
Celestial coordinates and finder chart of NGC 491A
Celestial coordinates for the J2000 equinox of NGC 491A are provided in the following table:
The simplified sky charts below show the position of NGC 491A in the sky. The first chart has a field of view of 60° while the second one has a field of view of 10°.
Rise and set times of NGC 491A from your location
Location: Greenwich, United Kingdom
Latitude: 51° 28’ 47” N
Longitude: 0° 00’ 00” E
Timezone: Europe/London
Today's NGC 491A - Spiral Galaxy in Sculptor rise, transit and set times from Greenwich, United Kingdom are the following (all times relative to the local timezone Europe/London):