|
Object |
M90 &
Companion IC 3538 |
|
Info |
M90 is one of the few large
spirals galaxies in the
Virgo Cluster
coming in at Mag. 10.33. The
outer arms of M90 are devoid of star formation as there are no notably
bright pinkish H II regions visible. IC3583
located to the bottom is a visible companion and is being distorted
by its larger neighbour. At a distance of 60 million l.y's away,
astronomers have discovered that M90 is moving toward us. It has enough
gravitational velocity to escape from the Virgo cluster where it resides. |
|
Date |
18 &
19/ 3/ 05 |
|
Location |
BayTop
Observatory- Streaky Bay South Australia |
|
Instrument |
Vixen
VC200L working @ f4.7 with Hm made focal reducer |
|
Mount |
Vixen 'GPDX'
controlled by a Mel Bartels Goto System |
|
Camera (CCD) |
Starlight
Xpress HX516 monochrome with Hm, made filter slider |
|
Exposures |
L: 120' R:
40' G: 40' B:40' (5' sub exposures all unbinned)
Dark frames removed from colour channels only. |
|
Guiding |
Sky
Watcher-f5 ST Refractor & a Meade LPI imager attached with
main scope on a home made accessory plate. |
|
Filters |
Astronomik
Type 2 CL.RGB set |
|
Notes/ Conditions |
Conditions- Seeing on both evenings was relatively
unsteady with a light dew. Transparency was average. Object rose no more
than aprox. 43 degrees altitude. |
