NGC 7331
NGC 7331 is one of 18 galaxies chosen by the HST Extragalactic Distance Scale Key Project to calibrate secondary distance estimators. The project will use the Hubble Space Telescope to obtain an accurate distance to galaxies via Cepheid variables, with the ultimate goal of using these to measure H0 (a cosmological parameter) to an external accuracy of 10%. It was determined this galaxy is 49 million light years away (and perhaps 30,000 light years across). In this image you will see some of the nearby neighbors being both spiral and elliptical galaxies. Nearby this field (not shown) is another famous group of galaxies known as Stephan's Quintet.
This image was taken as part of Advanced Observing Program (AOP) program at Kitt Peak Visitor Center during 2014.
Credit:KPNO/NOIRLab/NSF/AURA/Paul Mortfield and Dietmar Kupke/Flynn Haase
About the Image
| Id: | noao-n7331mortfield |
| Type: | Observation |
| Release date: | May 7, 2014, 6 a.m. |
| Size: | 2122 x 1448 px |
About the Object
Wallpapers
Coordinates
| Position (RA): | 22 36 52.17 |
| Position (Dec): | 34° 27' 52.78" |
| Field of view: | 11.99 x 8.19 arcminutes |
| Orientation: | North is 82.7° right of vertical |
Colors & filters
| Band | Wave-length | Tele-scope |
|---|---|---|
| Optical B | 438 nm | Visitor Center 0.5-meter Telescope Other CCD |
| Optical G | 475 nm | Visitor Center 0.5-meter Telescope Other CCD |
| Optical R | 625 nm | Visitor Center 0.5-meter Telescope Other CCD |
| Optical Broad Band | 555 nm | Visitor Center 0.5-meter Telescope Other CCD |