Movatterモバイル変換


[0]ホーム

URL:


Jump to content
WikipediaThe Free Encyclopedia
Search

1172 Äneas

From Wikipedia, the free encyclopedia
Jupiter trojan asteroid

1172 Äneas
1172 Aneas orbit and position on 28 Jul 2014
Discovery[1]
Discovered byK. Reinmuth
Discovery siteHeidelberg Obs.
Discovery date17 October 1930
Designations
(1172) Äneas
Pronunciation/ɪˈnəs/[2]
Named after
Aeneas (ΑἰνείαςAineias)[3]
(Greek mythology)
1930 UA
Jupiter trojan[1][4][5]
Trojan[6][7] · background[7]
AdjectivesÄneian
Orbital characteristics[4]
Epoch 23 March 2018 (JD 2458200.5)
Uncertainty parameter 0
Observation arc87.27yr (31,874 d)
Aphelion5.7602AU
Perihelion4.6762 AU
5.2182 AU
Eccentricity0.1039
11.92 yr (4,354 d)
238.45°
0° 4m 57.72s / day
Inclination16.664°
247.33°
50.803°
Jupiter MOID0.4772 AU
TJupiter2.9060
Physical characteristics
118.02±0.81 km[8]
142.82±4.8 km[9]
148.66±1.98 km[10]
8.681±0.003 h[11][a]
8.700±0.002 h[12][a]
8.701±0.001 h[13][a]
8.705±0.005 h[14]
8.708±0.009 h[15]
0.037±0.001[10]
0.0403±0.003[9]
0.059±0.006[8]
D(Tholen)[16]
D0(Barucci)[16]
DP(Tedesco)[16]
U–B =0.254±0.033[16]
B–V =0.840±0.050[17]
V–R =0.460±0.050[17]
V–I =0.990±0.017[5]
8.08±0.13[18]
8.33[1][4][9][10][8][5]

1172 Äneas/ɪˈnəs/ is a largeJupiter trojan from theTrojan camp, approximately 140 kilometers (90 miles) in diameter. It was discovered on 17 October 1930, by astronomerKarl Reinmuth at theHeidelberg Observatory in southwest Germany.[1] The darkD-type asteroid is one of thelargest Jupiter trojans and has arotation period of 8.7 hours.[5] It is named after the Trojan princeAeneas, from Greek mythology.[3]

Orbit and classification

[edit]

Äneas is located in theL5Lagrangian point, 60° behind Jupiter in the so-calledTrojan camp, orbiting in a1:1 resonance(seeTrojans in astronomy).[6] It is also a non-family asteroid of theJovian background population.[7][16]

It orbits the Sun at a distance of 4.7–5.8 AU once every 11 years and 11 months (4,354 days;semi-major axis of 5.22 AU). Its orbit has aneccentricity of 0.10 and aninclination of 17° with respect to theecliptic.[4] The body'sobservation arc begins with its official discovery observation at Heidelberg in October 1930.[1]

Naming

[edit]

Thisminor planet was named after the Trojan heroAeneas fromGreek mythology. He is the son of goddessAphrodite andAnchises after whom1173 Anchises was named. Theofficial naming was mentioned inThe Names of the Minor Planets byPaul Herget in 1955 (H 109).[3]

Physical characteristics

[edit]
The largestJupiter trojans
TrojanDiameter (km)
624 Hektor225
617 Patroclus140
911 Agamemnon131
588 Achilles130
3451 Mentor126
3317 Paris119
1867 Deiphobus118
1172 Äneas118
1437 Diomedes118
1143 Odysseus115
Source:JPL Small-Body Database,NEOWISE data

Rotation period

[edit]

Several rotationallightcurves ofÄneas have been obtained since the firstphotometric observations byWilliam Hartmann in 1988, that gave a period of 8.33 hours, and byStefano Mottola and Anders Erikson in 1993, using theESO 1-metre telescope atLa Silla Observatory in Chile. Lightcurve analysis gave arotation period of8.708±0.009 hours with a brightness variation of0.27±0.01magnitude (U=3).[5][15]

In July and August 2008, Susan Lederer atCTIO in Chile, andRobert Stephens at the Goat Mountain Astronomical Research Station (G79) in California, determined a well-defined period of8.705±0.005 h with an amplitude 0.20 magnitude (U=3).[5][14] Follow-up observations during 2015–2017 by Robert Stephens and Daniel Coley at theCenter for Solar System Studies gave three concurring periods of 8.701, 8.681 and 8.7 hours with an amplitude of 0.62, 0.40 and 0.21 magnitude, respectively (U=3/3/3),[11][12][13][a] while in August 2011,Pierre Antonini reported a period of 11.8 hours based on a fragmentary lightcurve (U=2-).[19]

Diameter and albedo

[edit]

According to the surveys carried out by the Infrared Astronomical SatelliteIRAS, the JapaneseAkari satellite and theNEOWISE mission of NASA'sWide-field Infrared Survey Explorer,Äneas measures between 118.02 and 148.66 kilometers in diameter – making it anywhere from the 8th to 4th largest Jupiter trojan – determined from a commonabsolute magnitude of 8.33 and a surfacealbedo between 0.037 and 0.059.[8][9][10] TheCollaborative Asteroid Lightcurve Link adopts the results obtained by IRAS, that is, an albedo of 0.0403 and a diameter of 142.82 kilometers based on an absolute magnitude of 8.33.[5]

100+ largest Jupiter trojans
Largest Jupiter Trojans by survey(A)
(mean-diameter in kilometers; YoD: Year of Discovery)
DesignationHWISEIRASAkariLnRPV–IYoDRef
624 Hektor7.2225233230.99L46.920.9301907list
617 Patroclus8.19140.362140.92140.85L5102.800.8301906list
911 Agamemnon7.89131.038166.66185.30L46.590.9801919list
588 Achilles8.67130.099135.47133.22L47.310.9401906list
3451 Mentor8.4126.288116.30117.91L57.700.7701984list
3317 Paris8.3118.790116.26120.45L57.090.9501984list
1867 Deiphobus8.3118.220122.67131.31L558.660.9301971list
1172 Äneas8.33118.020142.82148.66L58.710.9501930list
1437 Diomedes8.3117.786164.31172.60L424.490.8101937list
1143 Odysseus7.93114.624125.64130.81L410.110.8601930list
2241 Alcathous8.64113.682114.63118.87L57.690.9401979list
659 Nestor8.99112.320108.87107.06L415.980.7901908list
3793 Leonteus8.7112.04686.2687.58L45.620.7801985list
3063 Makhaon8.4111.655116.14114.34L48.640.8301983list
1583 Antilochus8.6108.842101.62111.69L431.540.9501950list
884 Priamus8.81101.09396.29119.99L56.860.9001917list
1208 Troilus8.99100.477103.34111.36L556.170.7401931list
1173 Anchises8.8999.549126.27120.49L511.600.7801930list
2207 Antenor8.8997.65885.1191.32L57.970.9501977list
2363 Cebriones9.1195.97681.8484.61L520.050.9101977list
4063 Euforbo8.795.619102.46106.38L48.850.9501989list
2357 Phereclos8.9494.62594.9098.45L514.390.9601981list
4709 Ennomos8.591.43380.8580.03L512.280.6901988list
2797 Teucer8.789.430111.14113.99L410.150.9201981list
2920 Automedon8.888.574111.01113.11L410.210.9501981list
15436 Dexius9.187.64685.7178.63L48.970.8701998list
3596 Meriones9.287.38075.0973.28L412.960.8301985list
2893 Peiroos9.2386.88487.4686.76L58.960.9501975list
4086 Podalirius9.185.49586.8985.98L410.430.8701985list
4060 Deipylos9.384.04379.2186.79L49.300.7601987list
1404 Ajax9.383.99081.6996.34L429.380.9601936list
4348 Poulydamas9.582.03270.0887.51L59.910.8401988list
5144 Achates9.080.95891.9189.85L55.960.9201991list
4833 Meges8.980.16587.3389.39L414.250.9401989list
2223 Sarpedon9.4177.48094.63108.21L522.740.8801977list
4489 Dracius9.076.59592.9395.02L412.580.9501988list
2260 Neoptolemus9.3176.43571.6581.28L48.180.9501975list
5254 Ulysses9.276.14778.3480.00L428.720.9701986list
3708 Socus9.375.66179.5976.75L56.550.9801974list
2674 Pandarus9.174.26798.10101.72L58.481.0001982list
3564 Talthybius9.473.73068.9274.11L440.590.9001985list
4834 Thoas9.172.33186.8296.21L418.190.9501989list
7641 Cteatus9.471.83968.9775.28L427.770.9801986list
3540 Protesilaos9.370.22576.8487.66L48.950.9401973list
11395 Iphinous9.868.97764.7167.78L417.381998list
4035 Thestor9.668.73368.2366.99L413.470.9701986list
5264 Telephus9.468.47273.2681.38L49.530.9701991list
1868 Thersites9.568.16370.0878.89L410.480.9601960list
9799 Thronium9.668.03364.8772.42L421.520.9101996list
4068 Menestheus9.567.62562.3768.46L414.400.9501973list
23135 Pheidas9.966.23058.2968.50L48.690.8602000list
2456 Palamedes9.365.91691.6699.60L47.240.9201966list
3709 Polypoites9.165.29799.0985.23L410.041.0001985list
1749 Telamon9.564.89881.0669.14L416.980.9701949list
3548 Eurybates9.663.88572.1468.40L48.710.7301973list
4543 Phoinix9.763.83662.7969.54L438.871.2001989list
12444 Prothoon9.863.83564.3162.41L515.821996list
4836 Medon9.563.27767.7378.70L49.820.9201989list
16070 Charops9.763.19164.1368.98L520.240.9601999list
15440 Eioneus9.662.51966.4871.88L421.430.9701998list
4715 Medesicaste9.762.09763.9165.93L58.810.8501989list
34746 Thoon9.861.68460.5163.63L519.630.9502001list
38050 Bias9.861.60361.0450.44L418.850.9901998list
5130 Ilioneus9.760.71159.4052.49L514.770.9601989list
5027 Androgeos9.659.78657.86n.a.L411.380.9101988list
6090 Aulis9.459.56874.5381.92L418.480.9801989list
5648 Axius9.759.29563.91n.a.L537.560.9001990list
7119 Hiera9.759.15076.4077.29L44000.9501989list
4805 Asteropaios10.057.64753.1643.44L512.371990list
16974 Iphthime9.857.34155.4357.15L478.90.9601998list
4867 Polites9.857.25158.2964.29L511.241.0101989list
2895 Memnon10.056.70655.67n.a.L57.500.7101981list
4708 Polydoros9.954.96455.67n.a.L57.520.9601988list
(21601) 1998 XO8910.054.90955.6756.08L412.650.9701998list
12929 Periboea9.954.07761.0455.34L59.270.8801999list
17492 Hippasos10.053.97555.67n.a.L517.751991list
5652 Amphimachus10.153.92153.1652.48L48.371.0501992list
2759 Idomeneus9.953.67661.0152.55L432.380.9101980list
5258 Rhoeo10.253.27550.77n.a.L419.851.0101989list
(12126) 1999 RM1110.153.202n.a.n.a.L5n.a.?1999list
(15502) 1999 NV2710.053.10055.6750.86L515.130.8751999list
4754 Panthoos10.053.02553.1556.96L527.681977list
4832 Palinurus10.052.05853.16n.a.L55.321.0001988list
5126 Achaemenides10.551.92244.2248.57L453.021989list
3240 Laocoon10.251.69550.77n.a.L511.310.8801978list
4902 Thessandrus9.851.26361.0471.79L47380.9601989list
11552 Boucolion10.151.13653.1653.91L532.441993list
(20729) 1999 XS14310.450.96146.30n.a.L45.721.0001999list
6545 Leitus10.150.95153.16n.a.L416.260.9101986list
4792 Lykaon10.150.87053.16n.a.L540.090.9601988list
21900 Orus10.050.81055.6753.87L413.450.9501999list
1873 Agenor10.150.79953.7654.38L520.601971list
5028 Halaesus10.250.77050.77n.a.L424.940.9001988list
2146 Stentor9.950.75558.29n.a.L416.401976list
4722 Agelaos10.050.37853.1659.47L518.440.9101977list
5284 Orsilocus10.150.15953.16n.a.L410.310.9701989list
11509 Thersilochos10.149.96053.1656.23L517.371990list
5285 Krethon10.149.60658.5352.61L412.041.0901989list
4791 Iphidamas10.149.52857.8559.96L59.701.0301988list
9023 Mnesthus10.149.15150.7760.80L530.661988list
5283 Pyrrhus9.748.35664.5869.93L47.320.9501989list
4946 Askalaphus10.248.20952.7166.10L422.730.9401988list
(22149) 2000 WD4910.248.19050.7750.37L47.841.0902000list
(32496) 2000 WX18210.248.01750.7751.63L523.340.9502000list
5120 Bitias10.247.98750.77n.a.L515.210.7801988list
12714 Alkimos10.147.81961.0454.62L428.481991list
7352 Hypsenor9.947.73155.6747.07L56480.8501994list
1870 Glaukos10.647.64942.23n.a.L55.991971list
4138 Kalchas10.146.46253.1661.04L429.20.8101973list
(23958) 1998 VD3010.246.00150.7747.91L45620.9901998list
4828 Misenus10.445.95446.3043.22L512.870.9201988list
4057 Demophon10.145.68353.16n.a.L429.821.0601985list
4501 Eurypylos10.445.52446.30n.a.L46.051989list
4007 Euryalos10.345.51548.4853.89L46.391973list
5259 Epeigeus10.344.74142.5944.42L418.421989list
30705 Idaios10.444.54646.30n.a.L515.741977list
16560 Daitor10.743.86151.4243.38L51991list
(15977) 1998 MA1110.443.53046.3051.53L52500.9061998list
7543 Prylis10.642.89342.23n.a.L417.801973list
4827 Dares10.542.77044.22n.a.L519.001988list
1647 Menelaus10.542.71644.22n.a.L417.740.8661957list
(A) Used sources:WISE/NEOWISE catalog (NEOWISE_DIAM_V1 PDS,Grav, 2012);IRAS data (SIMPS v.6 catalog); andAkari catalog (Usui, 2011); RP:rotation period andV–I (color index) taken from theLCDB

Note: missing data was completed with figures from the JPL SBDB (query) and from the LCDB (query form) for the WISE/NEOWISE and SIMPS catalogs, respectively. These figures are given in italics. Also, listing is incomplete above #100.

Spectral type

[edit]

In theTholen and Barucci classification,Äneas is a darkD-type asteroid, while in the Tedesco classification is asD/P-type asteroid. Its highV–I color index of 0.99 is typical for D-types.[16]

Notes

[edit]
  1. ^abcdLightcurve plots of (1172) Äneas fromJan 2015,Jan 2016 andDec 2016 (n.a.) by Daniel Coley andRobert Stephens at the Center for Solar System Studies (U80) and (U81). Quality code is 3/3/3 (lightcurve rating at CS3). Summary figures at theLCDB andCS3.

References

[edit]
  1. ^abcde"1172 Aneas (1930 UA)".Minor Planet Center. Retrieved13 June 2018.
  2. ^"Aeneas".Merriam-Webster.com Dictionary. Merriam-Webster.
  3. ^abcSchmadel, Lutz D. (2007). "(1172) Äneas".Dictionary of Minor Planet Names. Springer Berlin Heidelberg. p. 99.doi:10.1007/978-3-540-29925-7_1173.ISBN 978-3-540-00238-3.
  4. ^abcd"JPL Small-Body Database Browser: 1172 Aneas (1930 UA)" (2018-05-22 last obs.).Jet Propulsion Laboratory. Retrieved13 June 2018.
  5. ^abcdefg"LCDB Data for (1172) Äneas". Asteroid Lightcurve Database (LCDB). Retrieved3 March 2018.
  6. ^ab"List of Jupiter Trojans".Minor Planet Center. 2 February 2018. Retrieved3 March 2018.
  7. ^abc"Asteroid (1172) Äneas – Proper elements". AstDyS-2, Asteroids – Dynamic Site. Retrieved13 June 2018.
  8. ^abcdGrav, T.; Mainzer, A. K.; Bauer, J. M.; Masiero, J. R.; Nugent, C. R. (November 2012). "WISE/NEOWISE Observations of the Jovian Trojan Population: Taxonomy".The Astrophysical Journal.759 (1): 10.arXiv:1209.1549.Bibcode:2012ApJ...759...49G.doi:10.1088/0004-637X/759/1/49.S2CID 119101711. (online catalog)
  9. ^abcdTedesco, E. F.; Noah, P. V.; Noah, M.; Price, S. D. (October 2004)."IRAS Minor Planet Survey V6.0".NASA Planetary Data System – IRAS-A-FPA-3-RDR-IMPS-V6.0: IRAS-A-FPA-3-RDR-IMPS-V6.0.Bibcode:2004PDSS...12.....T. Retrieved15 June 2018.
  10. ^abcdUsui, Fumihiko; Kuroda, Daisuke; Müller, Thomas G.; Hasegawa, Sunao; Ishiguro, Masateru; Ootsubo, Takafumi; et al. (October 2011). "Asteroid Catalog Using Akari: AKARI/IRC Mid-Infrared Asteroid Survey".Publications of the Astronomical Society of Japan.63 (5):1117–1138.Bibcode:2011PASJ...63.1117U.doi:10.1093/pasj/63.5.1117. (online,AcuA catalog p. 153)
  11. ^abStephens, Robert D.; Coley, Daniel R.; French, Linda M. (July 2016)."A Report from the L5 Trojan Camp - Lightcurves of Jovian Trojan Asteroids from the Center for Solar System Studies".The Minor Planet Bulletin.43 (3):265–270.Bibcode:2016MPBu...43..265S.ISSN 1052-8091. Retrieved3 March 2018.
  12. ^abStephens, Robert D. (April 2017)."Lightcurve Analysis of Trojan Asteroids at the Center for Solar System Studies 2016 October - December".The Minor Planet Bulletin.44 (2):123–125.Bibcode:2017MPBu...44..123S.ISSN 1052-8091.PMC 7243949.PMID 32455395.
  13. ^abStephens, Robert D.; Coley, Daniel R.; French, Linda M. (July 2015)."Dispatches from the Trojan Camp - Jovian Trojan L5 Asteroids Observed from CS3: 2014 October - 2015 January".The Minor Planet Bulletin.42 (3):216–224.Bibcode:2015MPBu...42R.216S.ISSN 1052-8091. Retrieved3 March 2018.
  14. ^abFrench, Linda M.; Stephens, Robert D.; Lederer, Susan M.; Coley, Daniel R.; Rohl, Derrick A. (April 2011)."Preliminary Results from a Study of Trojan Asteroids".The Minor Planet Bulletin.38 (2):116–120.Bibcode:2011MPBu...38..116F.ISSN 1052-8091. Retrieved3 March 2018.
  15. ^abMottola, Stefano; Di Martino, Mario; Erikson, Anders; Gonano-Beurer, Maria; Carbognani, Albino; Carsenty, Uri; et al. (May 2011)."Rotational Properties of Jupiter Trojans. I. Light Curves of 80 Objects".The Astronomical Journal.141 (5): 32.Bibcode:2011AJ....141..170M.doi:10.1088/0004-6256/141/5/170.
  16. ^abcdef"Asteroid 1172 Äneas".Small Bodies Data Ferret. Archived fromthe original on 13 June 2018. Retrieved13 June 2018.
  17. ^abChatelain, Joseph P.; Henry, Todd J.; French, Linda M.; Winters, Jennifer G.; Trilling, David E. (June 2016)."Photometric colors of the brightest members of the Jupiter L5 Trojan cloud".Icarus.271:158–169.Bibcode:2016Icar..271..158C.doi:10.1016/j.icarus.2016.01.026.
  18. ^Veres, Peter; Jedicke, Robert; Fitzsimmons, Alan; Denneau, Larry; Granvik, Mikael; Bolin, Bryce; et al. (November 2015). "Absolute magnitudes and slope parameters for 250,000 asteroids observed by Pan-STARRS PS1 - Preliminary results".Icarus.261:34–47.arXiv:1506.00762.Bibcode:2015Icar..261...34V.doi:10.1016/j.icarus.2015.08.007.S2CID 53493339.
  19. ^Behrend, Raoul."Asteroids and comets rotation curves – (1172) Äneas". Geneva Observatory. Retrieved3 March 2018.

External links

[edit]
Minor planets
Asteroid
Distant minor planet
Comets
Other
Authority control databasesEdit this at Wikidata
Retrieved from "https://en.wikipedia.org/w/index.php?title=1172_Äneas&oldid=1232777990"
Categories:
Hidden categories:

[8]ページ先頭

©2009-2025 Movatter.jp