Here are some observing notes from the trip (left many out). There are
*many* objects I didn't get to, but that's fine, there will be future trips
to southern skies... I'll write some other time about *being* in Chile...
it was a wonderful experience...
All objects viewed with 10" f/5.7 CPT except as noted.
From La Silla airport in the southern Atacama Desert -
47 Tucana - 12 Nagler. Fills 90% of FOV, very dense and resolved to the
core with slight elongation in the outer spray of stars to the E/W. Seems
less dense NNE & WSW - several dense arms extending straight out - ENE, N,
SSE, E and SW. Extremely long reach W and N.
M42 12 Nagler. Object is at about 75 degrees elevation. Very bright, E&F
stars very steady. Green hue around Trapezium, ochre hues in
"wings". With 7 Nagler dark intrusion behind the Trap shows bright channel
near tip - reminds me of the Horsehead Nebula, Stars just outside to the S
with dim dark lane running to the E going N/S. M43 nearly attached to M42,
contrast difference in dark lane between M42 and M43. All sorts of dark
mottling in M43.
Eta Carina - 20 Nagler with UHC. NE portion of E section is very thick and
bright nebulosity, has dark knots with embedded star clusters. Wisps trail
off in a large oval to the E with thickest section to the S. Clusters are
in the N & S ends of the thick N/S section. Wide dark lane runs along the
SW/NE side of the brightest section. Incredible detail. Dimmer yet still
bright nebulosity is E of the thick section - separated by the large wide
dark lane, arcs around paralleling the N/W-S/E bright section. Dark lanes
extend S & E in very large diffuse nebulosity on the E end. More dark
lanes - wide ones, extend E of the E end of the nebula - a bright section
arcs all the way around. I drew a picture, but it doesn't do it justice.
IC2602 - Southern Pleaides - overflows the 20 Nagler. About 20 bright
stars over 1 degree field with several in nebulosity. 4 bright stars to W
run N/S. 4 bright stars E run N/S. This is a beautiful cluster. Mel 101
is close by to the N - nice evenly bright cluster.
NGC3132 - Eight Burst Planetary - 7 Nagler with 2X Barlow. Very bright
central star with dark area surrounding it. Very bright edges, brighter on
the E & W edges. W is brighter edge, seems ragged on the outside. This is
a great view.
Jupiter. The seeing was so steady, we looked at it. The view was rock
steady with tons of detail. GRS was jumping out and had great detail
itself. There were many bands - I'm not a planetary observer, but to my
count I came up with 20 bands alternating dark and light. The bands has
tremendous amounts of mottling. All four moons were easy very steady discs.
La Frontera
NGC4833 - open cluster - bright- looks like a globular. Dense center
diffusing out. Near a bright star.
NGC4372 - open cluster - large, dim, rich, with bright star embedded. Also
near a bright star.
NGC5189 - planetary nebula - large, obvious. W/NW - E/NE bar with strong
condensation to the NW. Responds well to OIII.
IC2944 - open cluster. Large, bright, fairly even mags, in rich Milky Way
field. Obvious in 9x50 finder.
NGC1300 and NGC1297 - larger is large and moderately bright galaxy
WNW/ESE. Other is NE, dimmer, smaller, elongated mostly E/W and may be
showing some spiral structure.
NGC1316 and NGC1317 - galaxies - Very bright, nearly stellar core with
large flattened halo and diffuse arms edge on extending E/W. Other is
close by to E, smaller, round with stellar core.
NGC2207 and NGC2163 - galaxies - very close together and oriented E/W. W
galaxy seems to have stellar core, E galaxy may be larger and disturbed.
NGC1566 - galaxy - large fairly bright spiral galaxy with 2 obvious arms
terminating to N & S. Stellar core with large halo.
NGC1546 and NGC1602 - galaxies - 1546 was bright and easy, I could not find
1602 in my 10" (hints of it in Ray's 13").
NGC2467 - Emission nebula - large, bight, round glow with bright star
embedded. Ragged on the N side, W of faint nebulosity that extended over
large distance to the E.
NGC2997 - galaxy - large face on spiral, bright with little detail at low
power. Slightly brighter core. With 7 Nagler the core is obvious, round,
smallish. Arms curve to E & W in backwards "S".
NGC3109 - Irregular galaxy - very large and diffuse, runs almost
E/W. Several stars overlay it with the brightest star just off center to
the W.
Jupiter - we had a shadow transit followed by the moon visible on the disk
of the planet. GRS was just past meridian.
NGC3100 and NGC3095. Both galaxies appear irregular. W galaxy appears to
have a dark band, E has a visible core.
NGC3115 - galaxy - nice elongated edge on spiral with a stellar core, good
tight central bulge - long extended thin arms SSW/ENE - similar to NGC4565
but a bit thicker core. May have dust lane on E side. Viewed with 7 Nagler.
Naked Eye - Scorpius - Arch is laying over the eastern Andes - hugging the
mountaintops. Stinger is curving down eastward and around, pointing
N. Thick band of dark nebula crosses into the curve of the tail from the
south, spreading out and ending near the stinger. Attaches to great dark
swath of dark neb W of the eastern curve of the tail, extending S and
curving W, ending by Alpha Cent, before the bright southern Milky Way,
before the Coal Sack and Southern Cross. This dark nebula behind Scorpius
looks like the Shadow of the Scorpion!
NGC6397 - globular cluster - Large and bright globular in Ara, may be the
equal of M13 for beauty. Mag 5.7. Very tight circular central core with
many outliers and stings extending outward.
NGC7269, NGC3271, NGC3267, NGC3268... and more. Galaxies. Amazed that in
my 10" Dob I could count up to 15 galaxies all close together in tight
clumps. This is a VERY interesting cluster of galaxies, and made me pine
for my 18" Dob!
NGC3354, NGC3358, NGC3357 - galaxies - the center galaxy was the brightest,
all evenly spaced apart in a row from E to W. W is the dimmest.
B92 - dark nebula and open cluster - laying just over the top of the
eastern Andes, it is a tremendous sight. Dark lanes are all over the place
from this southern view - extending all around the cluster rather than just
to one side as I am accustomed to from home. The dark neb seems rather
square around the cluster. There are huge black areas of dark neb.
NGC2516 - open cluster - very large and bright. Naked eye. Many bright
stars, coarse, fills most of the FOV, evenly distributed and round.
Shapley 1 - planetary nebula - large, annular. Brighter in W part of ring,
slightly elongated E/W.
NGC2808 - globular cluster - Nice glob, nicely condensed core, perhaps
elongated N/S with more stars to the W than E.
Vela SN remnant. Fills half the FOV with 20 Nagler and OIII in Ray's
13". Long thins strips run N/S.
NGC2867 - planetary nebula - small planetary is round, bright, with small
dark center. Possible mottling. With 7 Nagler and 2X Barlow - disk seems
to change in areas of brightness, seeming to indicate areas of internal
structure. Very blue planetary.
Limiting magnitude star count in Corvus (nearly at zenith) - mag 7.7
NGC3114 - open cluster - beautiful, large rich OC with bright star to E of
center and striking arc of stars curving from N to W to S that seemed to
define leading edge. Bright star at N tip. A dark "moat" seems to
encircle cluster and run inside the edge of the arc of stars.
M83 - galaxy - in 13". At zenith - best view ever. Bright core with
distinct N/S bar. Arms trail off ends of bar - haze fills in between arms
and bar. Core is very bright.
NGC3199 - nebula - locally called the Gabriella Mistral Nebula - or
Southern Crescent. With OIII, large half circle - actually full circle,
very large. SW portion very bright. Elongated N/S. N part of bright
section is ragged. Rest of bright section is faint by comparison. 1
degree E is round blob of neb with dark mottling, about 1/4 size of
3199. To E of that is dim N/S swath of neb to the S of a bright star.
Cool view! Omega Centauri in 20 N with top of Andes silhouetted in same FOV!
NGC3293 - open cluster - Nice open, medium size with many bright stars,
compact - jewel-like. In same FOV with 20 Nag and OIII is a crescent of
nebulosity larger than the cluster, W side very bright, perhaps a complete
circle. The OIII shows round nebulosity surrounding this cluster. A
bright star is on the S edge of the neb (the wide edge), neb dims around
the E and S edges, with no neb on the NW edge. Great view!
NGC3324 - nebula - described in NGC3293 above.
NGC3352 - open cluster - huge! fills FOV in 20 Nagler. OIII reveals N
half of cluster is in faint nebulosity - like M45, so cluster is really E/W
2 to 1 in somewhat of a box shape.
NGC3576 - nebula - very complex mix of bright and dark nebulosity - large
faint swath running WNW/ESE with 2 bright sections that appear similar to
Flame Nebula with extensions N/S. E section is smaller extending
E/W. Large dark lane on N and S sides, not dark lanes after all (higher
mag) - actually another large area of dimmer neb to the N running
E/W. With 12 Nagler & DGM filter W section is four individual pieces of
nebulosity - S part is smallest but brightest section to the WNW of a
bi-lobed section - actually 2 sections of neb at right angles to each
other. E section, removed from the complex part is "tadpole" in shape
with a dark lane W of an embedded star. Even more complex in Ray's 13".
At this point we had 11 people out looking through the telescopes - the two
imagers, property owner and his 21 year old son, and Cecelia (the chef).
NGC3766 - open cluster - bright, right and fairly large. Many curving
chains and streamers. Brightest 3 stars are red and yellow on the W, E and
SE side of the cluster.
NGC3915 - planetary nebula - bright, blue - with 7 Nagler central star is
in and out. With 7 Nagler and 2X Barlow it is bright with a large even
disk with a dark ring around the edges, elongated E/W. Outside is a very
large oval halo elongated E/W and off center with more to the W.
NGC4755 - open cluster - The Jewel Box - 7 bright stars over a fairly rich
medium sized cluster. 3 stars in the center have outstanding color - red,
blue and gold.
NGC4945 - galaxy - huge elongated galaxy reminds me of The Slug. SW/NE
with possible disturbed NE end. Dim core with possible mottling along the
length and hints of HII regions. Nearby dim planetary with visible star,
small dim round halo and dimmer outer halo elongated N/S, not on my charts,
may be galaxy?
NGC5128 - galaxy - Centaurus A. Large, round, bright with bifurcated dark
dust lane across entire galaxy running NW/SE. Split in dust lane in more
pronounced in SE end.
NGC5139 - Globular Cluster - Omega Centauri at 75 degrees elevation in 20
Nagler fills over 1/2 FOV. Stars are resolved across the object. Inner
1/2 is a dense ball. It is difficult to believe the size of this
cluster. Not as dense looking as others, but truly enormous (and naked eye).
Gum 12 - SN remnant - huge, wisps are very long and curving, criss-crossing
back onto itself. At times there are 2 sections in the same FOV. This
object is so large, Ray and I "walk" around it in his 13".
Naked Eye - we put our equipment away and Ray and I sat looking naked eye
at the southern sky. The Southern Cross overhead with the Coal Sack
seeming to be its shadow, equal in size. The False Cross, Omega Centauri,
dark lanes from the bottom of Scorpius south, the barrens of Antlia, Eta
Carina region, Alpha and Beta Centauri, the LMC and SMC circumpolar on the
southern horizon, Scorpius laying along the peaks of the Andes to our east,
Canopus blaring away. The sky is black, there are no light domes, the air
is crisp and clear at 6,000 feet. The southern sky is just now beginning
to become familiar and friendly. I look forward to seeing it again...
Clear (southern) skies,
Mark
ps - thanks to m, who gave me the incentive to make this trip a reality.
Received on Tue Mar 22 12:47:31 2005