M1: Crab Nebula

  Catalogues M1; NGC 1952
  Names Crab Nebula
  Type Supernova Remnant
  Constellation Taurus
  Season Visible in Evening Winter
  Conversation Notes Supernova recorded by Chinese, July 4, 1054.

This object is not particularly interesting visually, being small and faint. And it's hard to find. I keep it in my inventory of things that I can find because it's moderately well-known; the kind of thing that a visitor to the scope who has done some reading on Astronomy would ask to see.

Sky field above Orion, with location of M1 highlighted

Finding M1

M1 is technically in Taurus, but nearby Orion is so evident that it's easiest to find it associated with that constellation. Constellation Orion, with location of M1 in Taurus shown
Almost straight above Orion's shoulders, find Zeta Tauri. It's the first bright star forming a long narrow Triangle with Orion's shoulders. Image of Orion, showing location of Zeta Tauri above Orion's shoulders.
Mentally draw a line from Betelgeuse (Orion's left shoulder) to Zeta Tauri and beyond. Imagine a line from Betelgeuse, through Zeta Tauri, and beyond
M1 is almost on that line, about 1/2 Telrad radius further out. Telrad image pointed on that extended line, 1/2 Telrad beyond Zeta Tauri
If you centre Zeta Tauri in an 8x50 finder, M1 is in the finder field, about halfway to the outside of the field, on the opposite side from Orion. It is small and faint. 8x Finder image centred on Zeta Tauri, showing that M1 is visible in the field
This is a simulated view at 150x (e.g. my SV-105 with 4mm eyepiece). Simulated 4" telescope view of M1 at 150x magnification

Aren't nebulae supposed to be swirls of amazing colours? Not when viewed with your eyes - here is an explanation.

All the above images were generated with Starry Night Pro.


 
  111  accesses changed Feb 23, 2008
 
 
Copyright © 2008 Richard McDonald