From Simple English Wikipedia, the free encyclopedia
Deimos
(or
Mars II
) is the smaller
moon
of
Mars
. Its name comes from the Greek word for terror. Its
orbital period
is 30.3 hours, which is 1.263 days.
Deimos is only 15 kilometers in
diameter
. It is covered with
craters
, as
Earth
's moon and other bodies without an
atmosphere
are.
Deimos was discovered by
Asaph Hall
at the
United States Naval Observatory
in
Washington, D.C.
on 12 August 1877.
[1]
It is named after the god
Deimos
in
Greek mythology
, who was one of Mars' sons, and means Panic.
Deimos is not spherical with triaxial dimensions of 15 × 12.2 × 11 km.
[2]
Deimos is made up of
rock
rich in
carbonaceous
material
. It is has lots of
craters
.
[3]
Escape velocity
from Deimos is 5.6 m/s.
[4]
The
apparent magnitude
of Deimos is 12.45.
[5]
The Soviet
Phobos program
sent two probes to Phobos. In case
Phobos 1
succeeded,
Phobos 2
could have been sent to Deimos. Both probes launched successfully in July 1988.
In 1997 and 1998, the proposed
Aladdin
mission was selected. The plan was to visit both Phobos and Deimos, and launch
projectiles
at the
satellites
. The probe would collect the dust kicked into
space
as it made a slow flyby. These samples would be returned to Earth for study three years later.
[6]
Also, the sample-return mission called
Gulliver
to Deimos, in bringing 1 kilogram (2.2 pounds) of material from Deimos to
Earth
.
[7]
Another concept of sample-return mission from
Phobos
and Deimos is
OSIRIS-REx 2
, which would use heritage from the first
OSIRIS-REx
.
[8]
In March 2014, a mission was proposed to place an orbiter on
Mars
orbit
by 2021 and study Phobos and Deimos. It is called
Phobos And Deimos & Mars Environment
(PADME).
[9]
[10]
- ↑
Campbell, W. W. (1918).
"The Beginning of the Astronomical Day"
.
Publications of the Astronomical Society of the Pacific
.
30
(178): 358.
Bibcode
:
1918PASP...30..358C
.
doi
:
10.1086/122784
.
ISSN
0004-6280
.
S2CID
121676646
.
- ↑
"Deimos, moon of Mars - The Solar System on Sea and Sky"
.
www.seasky.org
. Retrieved
2020-10-25
.
- ↑
Busch, Michael W.; Ostro, Steven J.; Benner, Lance A.M.; Giorgini, Jon D.; Magri, Christopher; Howell, Ellen S.; Nolan, Michael C.; Hine, Alice A.; Campbell, Donald B. (2007).
"Arecibo radar observations of Phobos and Deimos"
.
Icarus
.
186
(2): 581?584.
Bibcode
:
2007Icar..186..581B
.
doi
:
10.1016/j.icarus.2006.11.003
.
- ↑
"Solar System Exploration: Planets: Mars: Moons: Deimos: Facts & Figures"
. 2012-10-12. Archived from
the original
on 2012-10-12
. Retrieved
2020-10-25
.
- ↑
"Planetary Satellite Physical Parameters"
.
ssd.jpl.nasa.gov
. Retrieved
2020-10-25
.
- ↑
Barnouin-Jha, O.S.; Cheng, A.F.; von Mehlem, U.I. (1999).
"Aladdin: Sample return from the moons of Mars"
.
1999 IEEE Aerospace Conference. Proceedings (Cat. No.99TH8403)
. Vol. 1. Snowmass at Aspen, CO, USA: IEEE. pp. 403?412 vol.1.
doi
:
10.1109/AERO.1999.794346
.
ISBN
978-0-7803-5425-8
.
S2CID
129101577
.
- ↑
Dr. Britt ? The Gulliver Mission: Sample Return from Deimos
(PDF)
.
- ↑
Elifritz, T. L. (2012-06-01).
"OSIRIS-REx II to Mars --- Mars Sample Return from Phobos and Deimos"
.
Concepts and Approaches for Mars Exploration
.
1679
: 4017.
Bibcode
:
2012LPICo1679.4017E
.
- ↑
Phobos And Deimos & Mars Environment (PADME): A LADEE-Derived Mission to Explore Mars's Moons and the Martian Orbital Environment
(PDF)
.
- ↑
Reyes, Tim (2014-10-01).
"Making the Case for a Mission to the Martian Moon Phobos"
.
Universe Today
. Retrieved
2020-10-25
.