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| Digitized Sky Survey (DSS) Image Information for NGC 4631 | |||
|---|---|---|---|
| DSS Acknowledgement , DSS Copyright Notice | DSS Image Generation: 1st Generation DSS Image | ||
| Image Center (2000): 12h 42m 08.1s; +32º 32' 26" | Image File Name: n4631.jpg | ||
| Image Size (arcminutes): 20' x 20' | Image Size (pixels): 353 x 353 | ||
| Original NGC Catalogue Data for NGC 4631 | |||
| General Catalogue Designation: 3165 | William Herschel Designation: V 42 | ||
| John Herschel Designation: 1397 | Other Observers: ... | ||
| Right Ascension (Equinox 1860): 12h 35m 22s | Annual RA Precession (Equinox 1880): +2.93s | ||
| North Polar Declination (Equinox 1860): 56° 40.9' | Annual DEC Precession (Equinox 1880): +19.8" | ||
| Summary Description: !, vB, vL, eE 70° ±, bMN, * 12 att n | |||
| Notes: † | Comments: … | ||
| Discovered by: Friedrich Wilhelm Herschel (1738 - 1822) | Year of Discovery: 1787 | ||
| Telescope Aperture (Inches): 18.7 | Telescope Type: Reflector | ||
| Understanding the 'Summary Description': Summary Description Abbreviations List | |||
| Contemporary/Current Data for NGC 4631 | |||
| Right Ascension (2000): 12h 42m 08.1s | Declination (2000): +32º 32' 26" | ||
| Object Type: Galaxy | Object Classification: Sc III | ||
| Constellation: Canes Venatici | Position Angle: 86 ° | ||
| Visual Magnitude: 9.1 | Surface Brightness: 13.0 | ||
| Blue Magnitude: 9.6 | Object Size: 15.5'X2.7' | ||
| Also Cataloged As: | UGC 7865, MCG+06-28-020, ARP 281, H V-42, h 1397, GC 3165, CGCG 188.016, KUG 1239+328B, IRAS 12396+3249, KCPG 350A, PGC 42637 | ||
| Catalogue Notes: Paired with NGC 4627. | |||
| Book / Chart References for NGC 4631 | |||
| Luginbuhl & Skiff (Page): 48 | Burnham's (Volume : Page): ------ | ||
| Uranometria 2000: 108 | Herald-Bobroff Astroatlas: C-29,C-30 | ||
| Microsky: 268 | GSC Small Region Number: 2531 | ||
| POSS Blue Plate #: 105 | POSS Red Plate #: 105 | ||
| Database Update Level: 2 (Complete) | |||
| Contemporary Visual Observation(s) for NGC 4631 | |||
NGC 4631 = UGC 07865 = MCG +06-28-020 = CGCG 188-016 = Arp 281 = PGC 42637 12 42 06.5 +32 32 24 V = 09.2; Size 15.5x2.7; SB = 13.1; PA = 86d 17.5": at 280x (14' field) this remarkable galaxy runs edge to edge across the field! The surface brightness is unusually irregular with bright and dark mottling across the surface. There is no well-defined core but a prominent knot is close following the geometric center along the north side and a second weaker knot is along the west side. The north edge has an unusually "scalloped" appearance particularly along the west side due to dust and brighter splotches. The galaxy gradually bulges towards the center and tapers at the tips, particularly along the west end. A mag 13 star is situated just north of the edge at the geometric center and N4627 appears to hover over this "starship" a couple of arcmin NW of center. 13": stunning galaxy, very bright, unusually large and interesting edge-on E-W, 15'x1.5'. A bright knot is east of the core and a faint knot is west of core. Appears very mottled along the major axis. A mag 13 star is just N of the core. A companion system N4627 lies 2.6' NW of the center. | |||
| Data Sources Used to research NGC 4631 | |||
| [NGC] New General Catalogue / [IC] Index Catalogue (Dreyer - 1888, 1895, 1908) [OHCDSO] Observing Handbook and Catalog of Deep-Sky Objects (Luginbuhl & Skiff - 1990) [GD-NGCDDB] NGC Discoverer's Database (DeLange - 1987 to 2006) [UGC] Uppsala General Catalog of Galaxies (Nilson - 1973) [ARP] Atlas of Peculiar Galaxies (H. Arp) [CGCG] Catalog of Galaxies & Clusters of Galaxies (Zwicky - 1968) [RE-AZDB] The Arizona Database®, V15.5 (Erdmann - 1987 thru 2006) [HC-PPL] NGC/IC Accurate Positions List Database (Corwin - 1996 thru 2006) [SG-NGCO] NGC/IC Observations Database (Gottlieb - 1998 thru 2006) [PGC] Principle Galaxy Catalog (Paturel et al. - 1989, 2003) [DSS] Digitized Sky Survey - 1st (102 CD-ROM) and 2nd (Web Site) Generation (STScI - 1994) [NED] NASA's Extragalactic Database (NED) located at http://nedwww.ipac.caltech.edu/ | |||
| Additional Notes | |||
| • 1st generation images were generated from the 102 CD-ROM version of the Digitized Sky Survey (DSS) • 2nd generation images were generated at the DSS web site located at http://archive.stsci.edu/cgi-bin/dsswin • Luginbuhl & Skiff page numbers are from 'Observing Handbook and Catalogue of Deep-Sky Objects' by Christian B. Luginbuhl and Brian A. Skiff, produced by Cambridge University Press • Burnham's refers to 'Burnham's Celestial Handbook' in three volumes produced by Dover Publications, Inc. • Uranometria 2000 chart numbers are for those printings authored by Tirion, Rappaport & Lovi, and are not for the most recent printings authored by Tirion, Rappaport & Remaklus in which the charts were re-numbered, all of which were and/or are produced by Willmann-Bell, Inc. • The Herald-Bobroff Astroatlas is by D. Herald and P. Bobroff of Canberra, Australia and is produced by HB2000 Publications • Microsky® is the microfiche rendition of the Palomar Observatory Sky Survey (POSS) produced by Deen Publications (P.O. Box 867088; Plano Texas 75086) • POSS refers to the Palomar Observatory Sky Survey produced by The National Geographic Society in conjunction with The California Institute of Technology • All DSS image annotation was performed by Robert E. Erdmann, Jr., and is ©Copyright 1996 through 2008 by Robert E. Erdmann, Jr. - All rights reserved • All product names, trademarks, and copyrights are the property of their respective owners • Contemporary/Current Data for this object was hand collected and entered from the data sources listed in the "Data Sources Used" section of this table above.- Robert E. Erdmann, Jr. | |||
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