Names | M 97, NGC 3587, PN G148.4+57.0 Owl Nebula |
Right Ascension (2000.0) | 11:14:47.7 |
Declination | +55:01:09 |
Constellation | Ursa Major |
Redshift (z) | ... |
Heliocentric Radial Velocity | ... |
Distance (esteem) | 2,600 light years |
Date (DD/MM/YYYY) | 10/02/2011 |
Exposure time | 15,000 seconds (10 x 1500 exposures) with binning mode 1 x 1 and AO-7 |
CCD Camera | SBIG ST-8XE |
Telescope | Meade Instruments Schmidt-Cassegrain 14" LX200 GPS |
Focal length | 3556 mm |
Diameter | 355.6 mm |
Focal ratio | 10 |
Field of View | 13.3 x 8.9 arcminute |
Original scale | 0.522 arcsecond / pixel |
Palomar Observatory Sky Survey images |
POSS I/E DSS1 Red |
POSS I/O DSS2 Blue |
POSS II/F DSS2 Red |
POSS II/J DSS2 Blue |
POSS II Color |
Sloan Digital Sky Survey images |
SDSS image |
Nordic Optical Telescope 2.5-meter telescope image |
NOT |
Comments |
The distance of the Owl nebula is uncertain. The bright galaxy just south of it is PGC 34279. Its Redshift is 0.033948 +/- 0.000076, the Heliocentric Radial Velocity 10177 +/- 23 km/s and the Distance 452,000,000 light years. |
The spiral galaxy in the north-eastern corner of the image is PGC 2489233. Its Redshift is 0.070739 +/- 0.000179, the Heliocentric Radial Velocity 21207 +/- 54 km/s and the Distance 909,000,000 light years. I used the Van Cittert's method of deconvolution (where the first parameter is the FWHM and the second is the number of iterations) or the Unsharp Masking (radius) to enhance the spiral structure. |