2012 Edition Updates

To report other corrections or to make suggestions for improvement, please send an email message to Handbook Editor.

Observer's Handbook 2012 Edition

The following corrections have been noted:

  • On p. 25, the units of GM should read as km³/s²

  • On p. 115, in the left column, the days of the week are incorrect following Sunday, Dec. 16. The 17th is a Monday, the 18th a Tuesday, and so on, until the 26, which is a Wednesday. Thereafter, the days are correct.

  • In the online Links page, a link to the Meteorical Bulletin database found on p. 261 was missing https://www.lpi.usra.edu/meteor/

  • On p. 284, In The Brightest Stars, the distance to Alpha Her AB (Rasalgethi) is 360 ly

  • On p. 299, Note the following updates to "Coloured Double Stars":

SPRING
The star 35 Sex has Dec +04º 45′ and the separation is 7″.
 
SUMMER
The star K Her should be denoted Kappa (Greek letter) Her.
 
AUTUMN
The star 2 Peg should be denoted h 1647 and the Dec should be 22º 11′  (error in source material).

  • On pp. 323–326, Update to DEEP-SKY GEMS

    For the purposes of creating an observing certificate for the Deep-Sky Gems, please note that the following Levy objects have been removed from the DSG list, as they are duplicated in other observing programs:  L1 (NGC 1931), L245 (NGC 6781), L325 (IC 1795), and L381 (U 5470).

    To maintain the list number at 154, the following objects have been added (see also Supplements page):

    • L324 (Tombaugh 5)   RA  3h 47.8′ Dec +59º 03′, mag: 8.4,  size: 14′—open cluster in Camelopardalis
    • L140 (NGC 4485)   RA 12h 30.5′ Dec +41º 42′, mag:11.9, size 2′x1.3′—elongated galaxy, just N of NGC 4490 (Cocoon Galaxy) in Canes Venatici
    • L120 (NGC 6451)  RA 17h 50.7′  Dec –30º 13′, mag: 8.2, size: 7′—"Tom Thumb Cluster," small open cluster near the galactic centre in Scorpius
    • L279 (NGC 6522/6528)   RA 18h 03.6′  Dec –30º 02′, mag: 8.3, size: 16.4′—“Baade’s Window,” two faint globular clusters close to the galactic centre in Sagittarius

    The updated list will appear in future editions of the Handbook.

  • On p. 331, the column headings "Min. Opacity" and "Aper." should read "Opacity" and "Min. Aper."
     
  • On the inside back cover, the dates given for November and December 2013 are incorrect and should be shifted right by one day. Thus 2013 November 1 is a Friday.
Author: 
james-deleted-51@jamesedgar.ca
Last modified: 
Friday, March 22, 2019 - 10:33am