Request for Information

Information Request on the Messier Objects

Following is a list of the most urgently required (or wanted) information on the Messier objects. Although we have usually invested considerable effort of research, we could not find very well confirmed (or no unique) data and informations in these cases. If you have any of the requested information, or some pointer or comment, please notify me.

Good (or at least considerably good) individual distances for the following galaxies:
- M64 (current value: 19 Mly).
- M74 (current value: 35 Mly)
- M77 (current value: 60 Mly)
- M83 (current value: 15 Mly)
- M94 (current value: 14.5 Mly)
- M104 (current value: 50 Mly)
- M106 (current value: 25 Mly)
- M108 (current value: 45 Mly)
- M109 (current value: 55 Mly)
Many other galaxy distances are also far from being safe or acurate; any corrections or pointers to modern references are certainly appreciated.
Data which help to clear the nature of the system or asterism of four stars, M73
More and more acurate data on the double star M40
Our history section, as well as the "similar catalog" section, would benefit if someone could provide me with the following historic deepsky catalog (see our "History of Deepsky Discovery" page):
- Johann Gottfried Koehler's catalog of 20 objects
A spectrum of M77 showing the Seyfert emission lines
HRDs or FHDs of some more Messier open and globular clusters, in particular M92

Hartmut Frommert (spider@seds.org)
Christine Kronberg (smil@lrz.uni-muenchen.de)

Last Modification: 12 Apr 2000, 23:20 MET