(IAAC) NGC 3587 (M97) - 4.25" F/7.8

Observer: Yann POTHIER (France)
Your skill: advanced (many years)
Object: Messier 97, M 97, NGC 3587 (PK 148+57.1; PN G148.4+57.0; ARO 25, VV 59)
Category: planetary nebula
Constellation: UMa
Object data: Vmag=9.9; Bmag=12.0; 203"x199" (209" in IDB); type IIIa;
central star of Vmag=16.1; discovered by Mechain in 1781; ELCAT: [OIII,
496+501nm] = 12 x [Hbeta, 486nm].
RA/DE: 11h14.80m, +5501.0' (2000.0)
Date and UT of observation: 29 December 1988, ...
Location & latitude: La Clapiere Obs. (France, latN44 40 00, longE06 27 36)
Site classification: rural, alt.1650m (5500ft)
Limiting magnitude (visual in UMi): ?
Transparency (1 to 5 - best to worst): 1
Seeing (1 to 5 - best to worst): ?
Moon up (phase?): no
Instrument: Japanese Newtonian 4.25"/114mm  f/7.8
Magnification: 36-100x
Filters used: -

Description: at 36x, with a yellow mag6 star, diffuse disk, quite faint; at
72x, larger, star 2' from the nebula; at 100x, extended but too faint.

Yann Pothier
11 impasse Canart, 75012 PARIS, FRANCE

To UNSUBSCRIBE from the 'netastrocatalog' lists, use the Web form at: