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Solar System - Comets and
Asteroids
Comets
Asteroids
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Comet Siding Spring passes Mars at closest
approach
Image
data: 19.10 2014 30 x 30
Seconds, Canon EOS 60 DA Telescope: Zeiss APQ , D = 150 mm, f = 1200
mm Location: Onjala Observatory at Onjala
Lodge, Namibia Image
processing: Nebulosity, Registar, Photoshop CS5
Load higher
resolution image and description of object |
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Minor
Planets |
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CLAUSBAADER
In the year 2015 we planned to
photograph the minor planet (5658) Clausbaader. It has had a high altitude in
the evening sky, close to Saturn. The series is intended as a small tribute to
Mr. Claus Baader, the founder of Baader Planetarium in Mammendorf, who was one
of the leading personalities in the field of amateur astronomy and public
education in the last century in Germany.
A detailed description and a lot of images we give in our section
"Special Project under the headline
Minor Planet Clausbaader
(5658) |
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PAECH
In November 2000 one of
us was given the great honour and a planetoid was named after
him.
In October 2011 "9700 Paech"
was in the constellation Pisces with a magnitude of about 17. So some CCD r
images were taken with the 150mm Zeiss APQ telescope.
The observations are put
together on a special page. Interested?
Then click here (sorry only in german language). |
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VESTA, Adorea and
Lilaea
The Planetoid
Vesta (4, 7m2), taken on 14.09.2018. 6 x 120 seconds with 200mm telephoto lens.
Additionally the picture shows the planetoids Adorea (268, 13m9) and Lilaea
(213, 13m2). Top left in the picture the planet Saturn.
Click the thumbnailto load a
large image.
Click here to load a large image with
object labeling.
The photo is part of a "special project" from
2018, in which all 8 planets (including Pluto) were photographed in a short
time interval. Interested? Then click
here
Below are three
animations of the first and last images of the series. |
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4
Vesta - 7m2 |
213
Adorea - 13m9 |
213
Lilaea - 13m2 |
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Helio (895)
Helio is a - with a diameter of almost 150km - quite
large typical main belt asteroid. Its orbital period around the sun is 5.73
years. It was discovered on 11 July 1918 by the Heidelberger astronomer Max
Wolf. It was named after the chemical element and noble gas helium.
On
26 April 2019 Helio was situated just west of the open star cluster Messier 48
in the constellation Water Serpent. The animation below shows the position of
Helio at 1 hour intervals. During this time Helio moved around 30.6 arcseconds.
Its brightness at the time was 13m9.
« Load large animation (1800pxl)
Helio together with Messier 48. |
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The pictures
below show on the left the trail of Helio and on the right an animation of
Helio in a time interval of 1 hour. |
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The Asteroids Ceres, Dione and
Katyusha
In the evening
of September 2, 2019 the planetoids Ceres, Dione and Katyusha together with the
globular cluster M 80 in the constellation Scorpio were together in the field
of view of our Astro Physics refractor EDFS 130mm at f = 850mm. In the same
field of view also the small and faint galaxies IC 4596 and IC
4600.
The brightnesses of the
planetoids this evening were: Ceres (1) 8m8, Dione (106) 13m8 and Katyusha
(1900) 17m1. With our ZWO ASI 071 Pro over 60 minutes of short exposures of 300
seconds each were recorded.
Click here or on the preview image to load a large image
with text labels »
More detailed information about Ceres here
here,
about Dione here and about Katyusha
here |
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« The trails at an exposure time of 60
minutes: left Ceres, middle Dione and right Katyusha
The 3 animations
below show the movement of the planetoids in a time interval of 60
minutes. |
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The Trojan 21000
Orus
Orus is an asteroid of the so called Trojan group.
Trojans are asteroids orbiting the sun on the orbit of Jupiter. Orus has a
position near Jupiter's Lagrange point L4 and thus belongs to the "Greek Group"
of Trojans, which precede the planet.
Orus has a diameter of about 51
kilometers, a rotation period of 13 hours and 27 minutes, and probably belongs
to the class of carbonaceous chondrites. The name Orus comes from the Greek
saga Iliad by Homer, which describes the Trojan War. It was discovered only in
1999 by the Japanese amateur astronomer Takao Kobayashi.
« Click here the thumbnail to load a large annoted
image. |
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In October
2021, NASA's Lucy spacecraft is scheduled to be
launched to explore six asteroids from Jupiter's Trojan group. The flyby of
Orus and Eurybates (see below) is planned for the turn of the year 2027/2028.
The naming of the space mission is curious,
more
details can be read here.
After determination of the orbital data Orus could be traced on
photographs back to 1951, so also plates of the Palomar/Leiden Sky Survey of
the couple v. Houten-Groeneveld and Tom Gehrels with the 48" Schmidt telescope.
Orbital elements, more information, and an animated orbit of Orus
can be found on the Jet Propulsion Laboratory's small-body
website .
Image data: Astro Physics 130mm EDFS at f = 850mm, ZWO
ASI 071 PRO camera with gain 50, exposure time 450 seconds each.
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The Trojan 3548
Eurybates
Eurybates is - like Orus - also an asteroid of the
Trojan group. Orus has a position near Jupiter's Lagrange point L4 and thus
belongs to the "Greek Group" of the Trojans, which precede the
planet.
Eurybates is the largest of the Trojans, with a diameter of
about 72 kilometers and a rotation period of 8.7 hours. Eurybates was the
friend and companion of Odysseus from the Greek myth Iliad by Homer. It was
discovered in 1973 during the Palomar/Leiden Sky Survey by the couple v.
Houten-Groeneveld and Tom Gehrels with the 48" Schmidt telescope.
» Click
here the thumbnail to load a large annoted image. |
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Eurybates has been known to be orbited by a moon since
January 2010. It was observed by the Hubble Space Telescope in September 2018
and in January 2020. With its 27th magnitude apparent magnitude, its diameter
is estimated between 600 - and 1000 meters. Its provisional provisional
designation is S/2018 (3548) 1 and it orbits
Eurybates at a distance of about 2000 kilometers.
Image data (Raw images: Dr. H.
Michaelis/DLR Berlin): Pentax SDP 105mm f = 670mm, camera QHY 174 M,
exposure time 600 seconds each. |
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