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194 Prokne

From Wikipedia, the free encyclopedia
Main-belt asteroid

194 Prokne
Orbital diagram
Discovery
Discovered byC. H. F. Peters, 1879
Discovery date21 March 1879
Designations
(194) Prokne
Pronunciation/ˈprɒkniː/[1]
Named after
Procne
A879 FA
Main belt
AdjectivesProknean/prɒkˈniːən/[2]
Orbital characteristics[3]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc136.76 yr (49950 d)
Aphelion3.2386 AU (484.49 Gm)
Perihelion1.9930 AU (298.15 Gm)
2.6158 AU (391.32 Gm)
Eccentricity0.23810
4.23yr (1545.3d)
42.282°
0° 13m 58.692s / day
Inclination18.509°
159.32°
163.24°
Earth MOID0.986917 AU (147.6407 Gm)
Jupiter MOID2.15988 AU (323.113 Gm)
TJupiter3.295
Physical characteristics
Dimensions168.42±4.1 km[3]
170.33±6.92 km[4]
Mass(2.68±0.29)×1018 kg[4]
1.03±0.16 g/cm3[4]
15.679 h (0.6533 d)[3][5]
0.0528±0.003
C
7.68

194 Prokne is amain-beltasteroid that was discovered by German-American astronomerC. H. F. Peters on March 21, 1879, inClinton, New York, and named afterProcne, the sister ofPhilomela inGreek mythology.Stellaroccultations by Prokne have been observed twice, in 1984 from Italy and again in 1999 fromIowa (United States).

Observations from theW. M. Keck Observatory show the asteroid to be around 151 km across, with a size ratio of1.13±0.06 between the major and minor axes. For comparison, observations by theIRAS observatory gave a diameter of 164 km.[6] The spectrum matches a classification of aC-type asteroid, indicating it has a primitivecarbonaceous composition. Judging from radar data, the near surface solid density of the asteroid is 3.6+1.1
−0.9 g cm−3.[7]

Based upon alight curve that was generated fromphotometric observations of this asteroid atPulkovo Observatory, it has a rotation period of15.679±0.001 hours and varies in brightness by0.16±0.02 inmagnitude.[5]

References

[edit]
  1. ^"Procne".Lexico UK English Dictionary.Oxford University Press. Archived fromthe original on 22 March 2020.
  2. ^Harris & Lee (2004)Shakespearean criticism, p. 113
  3. ^abcYeomans, Donald K.,"194 Prokne",JPL Small-Body Database Browser,NASA Jet Propulsion Laboratory, retrieved12 May 2016.
  4. ^abcCarry, B. (December 2012), "Density of asteroids",Planetary and Space Science, vol. 73, pp. 98–118,arXiv:1203.4336,Bibcode:2012P&SS...73...98C,doi:10.1016/j.pss.2012.03.009. See Table 1.
  5. ^abPilcher, Frederick (October 2011), "Rotation Period Determinations for 11 Parthenope, 38 Leda, 111 Ate 194 Prokne, 217 Eudora, and 224 Oceana",The Minor Planet Bulletin, vol. 38, no. 4, pp. 183–185,Bibcode:2011MPBu...38..183P.
  6. ^Marchis, F.; et al. (November 2006), "Shape, size and multiplicity of main-belt asteroids. I. Keck Adaptive Optics survey",Icarus, vol. 185, no. 1, pp. 39–63,Bibcode:2006Icar..185...39M,doi:10.1016/j.icarus.2006.06.001,PMC 2600456,PMID 19081813.
  7. ^Magri, C.; et al. (December 2001), "Radar constraints on asteroid regolith compositions using 433 Eros as ground truth",Meteoritics & Planetary Science, vol. 36, no. 12, pp. 1697–1709,Bibcode:2001M&PS...36.1697M,doi:10.1111/j.1945-5100.2001.tb01857.x.

External links

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