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16 Psyche information


16 Psyche
16 Psyche imaged by the Very Large Telescope's adaptive optics system in August 2019
Discovery
Discovered byAnnibale de Gasparis
Discovery siteNaples Observatory
Discovery date17 March 1852
Designations
Designation
(16) Psyche
Pronunciation/ˈsk/[1]
Named after
Psyche (Ψυχή)
Minor planet category
Main belt
AdjectivesPsychean (/sˈkən/)[2]
Symbol (historical)
Orbital characteristics[3]
Epoch 13 September 2023
(JD 2460200.5)
Aphelion3.32 AU (497 million km)
Perihelion2.53 AU (378 million km)
Semi-major axis
2.92 AU (437 million km)
Eccentricity0.1342
Orbital period (sidereal)
4.999 yr (1825.95 d)
Mean anomaly
243.16°
Inclination3.096°
Longitude of ascending node
150.03°
Time of perihelion
27 April 2025
Argument of perihelion
229.41°
Earth MOID1.53 AU (229 million km)
Physical characteristics
Dimensions(278±5 × 232±6 × 164±4) km[4]
277 km × 238 km × 168 km[4][a]
279 × 232 × 189 km (± 10%)[5]
(278+4
−8
× 238+4
−6
× 171+1
−5
) km
[6]
Mean diameter
223±3 km[7]
222±4 km[4]
222+1
−4
 km
[6]
Flattening0.41[b]
Volume5.75×106 km3 (best fit)[6]
Mass(2.29±0.14)×1019 kg[8]
Mean density
3.977±0.253 g/cm3
Surface gravity
~0.144 m/s2[5]
Escape velocity
~180 m/s[5] (~600 ft/s)
Synodic rotation period
4.195948±0.000001 h[5][6]
Albedo0.15±0.03[4]
0.34±0.08 (radar)[6]
Spectral type
Tholen = M[3]
SMASS = X[3]
Bus-DeMeo = Xk[9]
Apparent magnitude
9.22 to 12.19
Absolute magnitude (H)
6.21[3]

16 Psyche (/ˈsk/ SY-kee) is a large M-type asteroid, which was discovered by the Italian astronomer Annibale de Gasparis, on 17 March 1852 and named after the Greek goddess Psyche.[10] The prefix "16" signifies that it was the sixteenth minor planet in order of discovery. It is the largest and most massive of the M-type asteroids, and one of the dozen most massive asteroids. It has a mean diameter of approximately 220 kilometers (140 mi) and contains about one percent of the mass of the asteroid belt. It was thought to be the exposed core of a protoplanet,[11] but recent observations cast doubt on that hypothesis.[8][6] Psyche will be explored by NASA, with a spacecraft of the same name, marking the first time a manmade object will journey to a metallic asteroid, launched on 13 October 2023,[12] with an expected arrival in 2029.[13]

  1. ^ Cite error: The named reference Webster-1884 was invoked but never defined (see the help page).
  2. ^ Cite error: The named reference OED-Psychean was invoked but never defined (see the help page).
  3. ^ a b c d Cite error: The named reference JPL was invoked but never defined (see the help page).
  4. ^ a b c d Cite error: The named reference Ferrais-Vernazza-etal-2020 was invoked but never defined (see the help page).
  5. ^ a b c d Cite error: The named reference Shepard-Richardson-etal-2017 was invoked but never defined (see the help page).
  6. ^ a b c d e f Cite error: The named reference Shepard2021 was invoked but never defined (see the help page).
  7. ^ a b Cite error: The named reference Vernazza2021 was invoked but never defined (see the help page).
  8. ^ a b Cite error: The named reference Elkins-Tanton_2020 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference PDS-taxonomy was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference Schmadel-2012-dict-mp was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference Bell_AsteroidsII was invoked but never defined (see the help page).
  12. ^ Cite error: The named reference Lockhart-2023-09-28 was invoked but never defined (see the help page).
  13. ^ "NASA Continues Psyche Asteroid Mission". JPL. NASA. 28 October 2022. Archived from the original on 8 November 2022. Retrieved 28 October 2022.


Cite error: There are <ref group=lower-alpha> tags or {{efn}} templates on this page, but the references will not show without a {{reflist|group=lower-alpha}} template or {{notelist}} template (see the help page).

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16 Psyche

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needed] or two to three times the world production of 2004. The asteroid 16 Psyche is believed to contain 1.7×1019 kg of nickel–iron, which could supply...

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Based on spectral analysis, it has been suggested that the asteroid 16 Psyche may be the common parent for this type of meteorite. Unlike most other...

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Patrick A.; et al. (2017). "Radar observations and shape model of asteroid 16 Psyche". Icarus. 281: 388–403. Bibcode:2017Icar..281..388S. doi:10.1016/j.icarus...

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Emery JP (Oct 2016). "Detection of water and/or hydroxyl on Asteroid (16) Psyche". Astronomical Journal. 153 (1): 31. arXiv:1610.00802. Bibcode:2017AJ...

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