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122 Gerda information


122 Gerda
3D convex shape model of 122 Gerda
Discovery
Discovered byChristian Heinrich Friedrich Peters
Discovery date31 July 1872
Designations
MPC designation
(122) Gerda
Pronunciation/ˈɡɜːrdə/[1]
Alternative designations
A872 OA; 1948 TQ1
Minor planet category
Main belt
Orbital characteristics[2]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc143.71 yr (52491 d)
Aphelion3.32884 AU (497.987 Gm)
Perihelion3.11932 AU (466.644 Gm)
Semi-major axis
3.22408 AU (482.316 Gm)
Eccentricity0.032493
Orbital period (sidereal)
5.79 yr (2114.5 d)
Average orbital speed
16.59 km/s
Mean anomaly
163.616°
Mean motion
0° 10m 12.911s / day
Inclination1.64006°
Longitude of ascending node
178.139°
Argument of perihelion
321.617°
Earth MOID2.13107 AU (318.804 Gm)
Jupiter MOID1.66324 AU (248.817 Gm)
TJupiter3.187
Physical characteristics
Dimensions81.69±1.9 km
Mass5.7×1017 kg
Equatorial surface gravity
0.0228 m/s2
Equatorial escape velocity
0.0432 km/s
Synodic rotation period
10.685 h (0.4452 d)[2]
10.687 ± 0.001 h[3]
Geometric albedo
0.1883±0.009
Temperature~155 K
Spectral type
S[4]
Absolute magnitude (H)
7.87

Gerda (minor planet designation: 122 Gerda) is a fairly large outer main-belt asteroid that was discovered by German-American astronomer C. H. F. Peters on July 31, 1872, and named after Gerðr, the wife of the god Freyr in Norse mythology. Based upon its spectrum, this is classified as an S-type asteroid.[4] It is listed as a member of the Hecuba group of asteroids that orbit near the 2:1 mean-motion resonance with Jupiter.[5]

Photometric observations of this asteroid in 2007 were used to produce a light curve that showed that Gerda rotates every 10.687 ± 0.001 hours and varied in brightness by 0.16 in magnitude.[3] In 2009, observations at the Organ Mesa Observatory in Las Cruces, New Mexico generated a light curve with a period of 10.712 ± 0.01 hours with a brightness variation of 0.11 ± 0.01 magnitudes. This is compatible with previous studies.[6]

  1. ^ Noah Webster (1884) A Practical Dictionary of the English Language
  2. ^ a b Cite error: The named reference JPL was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference Buchheim2007 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Devogèle2018 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference McDonald1948 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference Pilcher2009 was invoked but never defined (see the help page).

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Robert Capa

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to Paris, where he met and began to work with his professional partner Gerda Taro, and they began to publish their work separately. Capa's deep friendship...

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Martin Bormann

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(biathlon and cross-country skiing)  Susi Erdmann (GER) (luge and bobsleigh)  Gerda Weissensteiner (ITA) (luge and bobsleigh)  Eric Flaim (USA) (long track...

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Suger

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Treasures, edited, translated, and annotated by Erwin Panofsky and Gerda Panofsky-Soergel, 122–37. 2nd ed. Princeton: Princeton University Press, 1979. ———...

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Education

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Omaima El; Meeter, Martijn; Heymans, Martijn W.; Jansma, Elise P.; Croiset, Gerda; Kusurkar, Rashmi A. (2018). "Factors Influencing Academic Motivation of...

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Michael Berenbaum

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reference work of 2006. Berenbaum co-produced One Survivor Remembers: The Gerda Weissmann Klein Story, a film which was recognized with an Academy Award...

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Emilio Segrè in 1945 or Glenn Seaborg. In 1958, Walter Seelmann-Eggebert and Gerda Pfennig published the first edition of the Karlsruhe Nuclide Chart. Its...

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The Snow Queen: Part 1 - Kay and Gerda Hans Christian Andersen Enid Lorimer 3-Jan-66 17 The Snow Queen: Part 2 - Gerda and the Magic Flower Garden Hans...

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Julius Wellhausen and Theodor Nöldeke argued for its etymological relevance. Gerda Lerner postulates that the story of Eve's creation from Adam's rib may have...

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