52246 Donaldjohanson

52246 Donaldjohanson
Donaldjohanson imaged by the Hubble Space Telescope on 9 January 2021
Discovery[1]
Discovered byS. J. Bus
Discovery siteSiding Spring Obs.
Discovery date2 March 1981
Designations
(52246) Donaldjohanson
Named after
Donald Johanson [1]
(paleoanthropologist)
1981 EQ5 · 1998 YF26
main-belt [1][2] · (inner)
Erigone [3][4]
Orbital characteristics[2]
Epoch 25 February 2023 (JD 2460000.5)
Uncertainty parameter 0
Earliest precovery date14 February 1981[1]
Aphelion2.830 AU
Perihelion1.936 AU
2.383 AU
Eccentricity0.1876
3.68 yr (1,343 d)
186.269°
0° 16m 4.79s / day
Inclination4.424°
262.809°
213.016°
Physical characteristics
3.895±0.013 km[5]
251±1 hr[6]
0.103±0.019[5]
C [3]
15.69[2]

52246 Donaldjohanson (provisional designation 1981 EQ5) is a carbonaceous Erigonian asteroid from the inner regions of the asteroid belt, approximately 4 kilometers (2.5 miles) in diameter. It was discovered on 2 March 1981, by American astronomer Schelte Bus at the Siding Spring Observatory in Australia. The C-type asteroid is a target of the Lucy mission and was aptly named after American paleoanthropologist Donald Johanson, the discoverer of the "Lucy" hominid fossil.[1]

Orbit and classification

Animation of Lucy's trajectory around Sun
  Lucy ·    Sun ·    Earth ·    52246 Donaldjohanson  ·   3548 Eurybates ·    21900 Orus ·    617 Patroclus

Donaldjohanson is a member of the Erigone family (406),[3][4] a large carbonaceous asteroid family of nearly 2,000 known members, which is named after its parent body 163 Erigone. It is a relatively old family that was created approximately 130 million years ago.[7]

It orbits the Sun in the inner asteroid belt at a distance of 1.9–2.8 AU once every 3 years and 8 months (1,345 days; semi-major axis of 2.38 AU). Its orbit has an eccentricity of 0.19 and an inclination of 4° with respect to the ecliptic.[2] A first precovery was taken at the discovering observatory in February 1981, extending the body's observation arc by 2 weeks prior to its official discovery observation.[1]

Physical characteristics

Donaldjohanson has been characterized as a carbonaceous C-type asteroid,[3] in-line with the C and X overall spectral type for Erigonian asteroids.[7]: 23  It has an absolute magnitude of 15.5.[2]

Lightcurve

Photometric observations of Donaldjohanson in August 2020 revealed that it is a slow rotator with an exceptionally high lightcurve amplitude of 1.7 magnitude.[8][6] The lightcurve suggests that Donaldjohanson must either be highly elongated in shape, or possibly a synchronous binary system.[8] Extensive photometric observations by the two TRAPPIST telescopes from November 2020 to February 2021 determined the rotation period of Donaldjohanson to be approximately 252 hours.[9]

Diameter and albedo

According to the survey carried out by NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Donaldjohanson measures 3.895 kilometers in diameter and its surface has an albedo of 0.103.[5]

Exploration

Donaldjohanson is planned to be visited by the Lucy spacecraft that was launched on 16 October 2021. The flyby is scheduled for 20 April 2025, and will approach the asteroid to a distance of 922 kilometers (573 mi) at a relative velocity of 13.4 kilometers (8.3 mi) per second.[3]

Naming

This minor planet is planned to be visited by the Lucy spacecraft, which would observe it en route to its main target of several Jupiter trojans.[10] The Lucy probe is named after the "Lucy" hominid fossil, while Donaldjohanson is named for that fossil's co-discoverer Donald Johanson (born 1943), an American paleoanthropologist. The approved naming citation was published by the Minor Planet Center on 25 December 2015 (M.P.C. 97569).[1][11]

See also

References

  1. ^ a b c d e f g "52246 Donaldjohanson (1981 EQ5)". Minor Planet Center. Retrieved 28 April 2018.
  2. ^ a b c d e "JPL Small-Body Database Browser: 52246 Donaldjohanson (1981 EQ5)" (2017-01-29 last obs.). Jet Propulsion Laboratory. Retrieved 28 April 2018.
  3. ^ a b c d e Levison, H. F.; Olkin, C.; Noll, K. S.; Marchi, S.; Lucy Team (March 2017). "Lucy: Surveying the Diversity of the Trojan Asteroids: The Fossils of Planet Formation" (PDF). 48th Lunar and Planetary Science Conference (1964): 2025. Bibcode:2017LPI....48.2025L. Retrieved 13 April 2017.
  4. ^ a b "Asteroid 52246 Donaldjohanson – Nesvorny HCM Asteroid Families V3.0". Small Bodies Data Ferret. Retrieved 27 October 2019.
  5. ^ a b c Masiero, Joseph R.; Mainzer, A. K.; Grav, T.; Bauer, J. M.; Cutri, R. M.; Dailey, J.; et al. (November 2011). "Main Belt Asteroids with WISE/NEOWISE. I. Preliminary Albedos and Diameters". The Astrophysical Journal. 741 (2): 20. arXiv:1109.4096. Bibcode:2011ApJ...741...68M. doi:10.1088/0004-637X/741/2/68. S2CID 118745497.
  6. ^ a b Levison, Harold F.; Olkin, Catherine B.; Noll, Keith S.; Marchi, Simone; Bell III, James F.; Bierhaus, Edward; et al. (October 2021). "Lucy Mission to the Trojan Asteroids: Science Goals". The Planetary Science Journal. 2 (5): 13. Bibcode:2021PSJ.....2..171L. doi:10.3847/PSJ/abf840. hdl:1721.1/147983.
  7. ^ a b Nesvorný, D.; Broz, M.; Carruba, V. (December 2014). "Identification and Dynamical Properties of Asteroid Families". Asteroids IV. pp. 297–321. arXiv:1502.01628. Bibcode:2015aste.book..297N. doi:10.2458/azu_uapress_9780816532131-ch016. ISBN 9780816532131. S2CID 119280014.
  8. ^ a b Noll, Keith (4 December 2020). "Is the Lucy Mission Target (52246) Donaldjohanson a Binary?" (HST Proposal 16452). Mikulski Archive for Space Telescopes. Retrieved 28 September 2021.
  9. ^ Ferrais, Marin; Jehin, Emmanuel; Manfroid, Jean; Moulane, Youssef; Barkaoui, Khalid; Benkhaldoun, Zouhair (October 2021). Rotation period determination of NASA Lucy mission target (52246) Donaldjohanson. 53rd Annual DPS Meeting. American Astronomical Society. 1226. Retrieved 28 September 2021.
  10. ^ Casey Dreier; Emily Lakdawalla (30 September 2015). "NASA announces five Discovery proposals selected for further study". The Planetary Society. Retrieved 12 April 2017.
  11. ^ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 28 April 2018.

Read other articles:

Harimau Champawat

Harimau Champawat lbs Harimau Champawat adalah seekor harimau bengal betina yang bertanggung jawab atas kematian sekitar 436 jiwa di Nepal dan wilayah Kumaon di India, selama tahun-tahun akhir abad ke-19 dan tahun-tahun pertama abad ke-20. Serangannya telah terdaftar dalam Guinness Book of World Records sebagai angka korban terbanyak oleh seekor harimau.[1] Sang harimau ditembak mati pada 1907 oleh Jim Corbett.[2] Sejarah Menurut Peter Byrne, seorang pemburu profesional dan pe...

 

Pierre Pelot

Pierre PelotPierre Pelot en 2011BiographieNaissance 13 novembre 1945 (78 ans)Saint-Maurice-sur-Moselle (Vosges, France)Nom de naissance Pierre GrosdemangePseudonymes Pierre Suragne, Pierre CarbonariNationalité françaiseActivités Écrivain, écrivain de science-fiction, auteur de littérature pour la jeunesseEnfant Dylan PelotAutres informationsGenre artistique Science-fiction, fantastique, romans noirs, western, littérature d'enfance et de jeunesseSite web pierrepelot.frBlog officiel...

 

List of United States commemorative coins and medals (1900s)

1903 Non-circulating coins Face value Coin Obverse design Reverse design Composition Mintage Available Obverse Reverse $1 Louisiana Purchase Jefferson dollar Thomas Jefferson Denomination, 1803-1903 90% Au, 10% Cu Authorized: 250,000 (max, both varieties) Uncirculated: 125,029 (P) Proof: 100 (P) 1903 $1 Louisiana Purchase McKinley dollar William McKinley Denomination, 1803-1903 90% Au, 10% Cu Uncirculated: 125,029 (P) Proof: 100 (P) 1903 1904 Non-circulating coins Face value Coin Obverse des...

Kampungdalem, Tulungagung, Tulungagung

KampungdalemKelurahanKantor Lurah KampungdalemNegara IndonesiaProvinsiJawa TimurKabupatenTulungagungKecamatanTulungagungKode Kemendagri35.04.01.1009 Kode BPS3504120008 Luas-Jumlah penduduk-Kepadatan- Untuk kelurahan di Kota Kediri, lihat Kampungdalem, Kediri, Kediri. Kampungdalem adalah kelurahan di kecamatan Tulungagung, Kabupaten Tulungagung, Jawa Timur, Indonesia. Pranala luar (Indonesia) Keputusan Menteri Dalam Negeri Nomor 050-145 Tahun 2022 tentang Pemberian dan Pemutakhiran Kode, ...

 

Ma'agan

Place in Northern, IsraelMa'agan מַעֲגָןMa'aganCoordinates: 32°42′23″N 35°36′0″E / 32.70639°N 35.60000°E / 32.70639; 35.60000CountryIsraelDistrictNorthernCouncilEmek HaYardenAffiliationKibbutz MovementFounded1949Founded byTransylvanian immigrantsPopulation (2022)[1]395 Ma'agan (Hebrew: מַעֲגָן, lit. 'Harbour') is a kibbutz in northern Israel. Located on the southern shore of the Sea of Galilee, it falls under the jur...

 

Bendera Madagaskar

Rasio bendera: 2:3 Bendera Madagaskar disetujui tanggal 14 Oktober 1958, dua tahun sebelum kemerdekaan, sementara Madagaskar bersiap-siap untuk referendum mengenai statusnya dalam Perkumpulan Prancis. Warna bendera menggambarkan sejarah Madagaskar, menginginkan kemerdekaan, dan warga tradisional. Merah dan putih adalah warna kerajaan Merina, yang dijajah Prancis tahun 1896. Digunakan pada bendera monarki terakhir Merina, Ratu Ranavalona III. Mereka dapat menandai asal etnis bangsa Malagasi d...

Boman Irani

Boman IraniLahir2 Desember 1959 (umur 64) Mumbai, Maharashtra, IndiaPekerjaanAktor film pengisi suaraTahun aktif2000–sekarangSuami/istriZenobia IraniAnak2 Danesh dan Kayoze IraniSitus webwww.bomanirani.com Boman Irani (pengucapan bahasa Hindustani: [boːmaːn iːraːnːiː] bahasa Gujarat: બોમન ઇરાની;) (lahir 2 Desember 1959) adalah seorang pemeran film dan teater, pengisi suara dan fotografer. Terkadang ia dikaitkan dengan sebutan David Walliams dari I...

 

Elezioni presidenziali in Ucraina del 1991

Elezioni presidenziali in Ucraina del 1991 Stato  Ucraina Data 1º dicembre Candidati Leonid Kravčuk Vyacheslav Chornovil Partiti Indipendente Movimento Popolare dell'Ucraina Voti 19.643.48161,59% 7.420.72723,27% Distribuzione del voto per oblast' e città autonoma Presidente uscente Leonid Kravčuk (ad interim) - 1994 Le elezioni presidenziali in Ucraina del 1991 si tennero il 1º dicembre, insieme al referendum sull'indipendenza nazionale. Risultati Candidati Partiti Voti % Leonid Kr...

 

Confédération des syndicats nationaux

Trade union federation in Quebec CSNConfederation of National Trade UnionsConfédération des syndicats nationauxFounded1921HeadquartersMontreal, QuebecLocationCanadaMembers 300,000[1]Key peopleCaroline Senneville, president Jean Lortie, secretary generalAffiliationsITUCWebsitewww.csn.qc.ca The Confédération des syndicats nationaux (CSN; Confederation of National Trade Unions) is the second largest trade union federation in Quebec by membership. History It was founded in Hull in 192...

坂上晶

この項目には、一部のコンピュータや閲覧ソフトで表示できない文字（Microsoftコードページ932（はしご高）など）が含まれています（詳細）。 さかがみ しょう坂上 晶プロフィール本名 坂上 晶性別 男性出身地 日本・東京都[1]誕生日 7月10日血液型 O型[1]身長 178 cm[1]職業 声優所属 株式会社S[1]公式サイト 坂上晶｜S活動活動期間 2011年 -デビュー作...

 

Tito Livio

Disambiguazione – Livio rimanda qui. Se stai cercando altri significati, vedi Livio (disambigua). (LA) «Neque indignetur sibi Herodotus aequari Titum Livium» (IT) «Che Erodoto non s'indigni che gli venga eguagliato Tito Livio» (Quintiliano, Institutio oratoria, X, 1, 101) Busto di Tito Livio, opera di Lorenzo Larese Moretti (1858-1867) Tito Livio (in latino Titus Livius[1]; Patavium, 59 a.C. – Patavium, 17 d.C.) è stato uno storico romano, autore degli Ab Ur...

 

Leon Dabo

Leon DaboDabo in 1909, photo by E.O. HoppéLahir(1864-07-09)9 Juli 1864Paris, PerancisMeninggal7 November 1960(1960-11-07) (umur 96)New York City, Amerika SerikatDikenal atasLukisanGerakan politikTonalismePenghargaan1934, made Chevalier of the Légion d'honneur, France Leon Dabo (9 Juli 1864 – 7 November 1960)[N 1] adalah seorang pelukis tonalis lukisan lanskap yang terkenal karena lukisannya tentang New York, khususnya Lembah Hudson. Lukisan-lukisannya dikenal k...

F2RL2

Protein-coding gene in the species Homo sapiens F2RL2IdentifiersAliasesF2RL2, PAR-3, PAR3, coagulation factor II thrombin receptor like 2External IDsOMIM: 601919; MGI: 1298208; HomoloGene: 36151; GeneCards: F2RL2; OMA:F2RL2 - orthologsGene location (Human)Chr.Chromosome 5 (human)[1]Band5q13.3Start76,615,482 bp[1]End76,623,413 bp[1]Gene location (Mouse)Chr.Chromosome 13 (mouse)[2]Band13 D1|13 50.38 cMStart95,833,361 bp[2]End95,839,247 bp[2]...

 

開拓使

この項目では、明治時代に存在した官庁について説明しています。同名を称した官営幌内鉄道（北海道炭礦鉄道）の客車については「開拓使号客車」をご覧ください。 この記事は検証可能な参考文献や出典が全く示されていないか、不十分です。 出典を追加して記事の信頼性向上にご協力ください。（このテンプレートの使い方）出典検索?: 開拓使 – ニュ...

 

غرير أوروبي

هذه المقالة تحتاج للمزيد من الوصلات للمقالات الأخرى للمساعدة في ترابط مقالات الموسوعة. فضلًا ساعد في تحسين هذه المقالة بإضافة وصلات إلى المقالات المتعلقة بها الموجودة في النص الحالي. (أغسطس 2023) اضغط هنا للاطلاع على كيفية قراءة التصنيف الغرير الأوروبي noicon حالة الحفظ   أن�...

Simple harmonic motion

To-and-fro periodic motion in science and engineering Simple harmonic motion shown both in real space and phase space. The orbit is periodic. (Here the velocity and position axes have been reversed from the standard convention to align the two diagrams) Part of a series onClassical mechanics F = d p d t {\displaystyle {\textbf {F}}={\frac {d\mathbf {p} }{dt}}} Second law of motion History Timeline Textbooks Branches Applied Celestial Continuum Dynamics Kinematics Kinetics Statics Statistical ...

 

Stile concitato

This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed.Find sources: Stile concitato – news · newspapers · books · scholar · JSTOR (April 2014) (Learn how and when to remove this message) Stile concitato (rather Genere concitato[1]) or agitated style is a Baroque style developed by Claudio Monteverdi with effects such as...

 

Nyingma

School of Tibetan Buddhism Statue of Padmasambhava, a founder of the Nyingma school, in Bhutan Part of a series onTibetan Buddhism Schools Nyingma Kadam Sakya Bodong Kagyu Jonang Gelug Rimé Key personalities First dissemination Padmasambhāva Śāntarakṣita Kamalaśīla Songtsen Gampo Trisong Detsen Ralpacan Second dissemination Atiśa Talika Abhayakirti Niguma Sukhasiddhi Milarepa Nyingma Yeshe Tsogyal Longchenpa Jigme Lingpa Patrul Rinpoche Dudjom Lingpa Mipham Kagyu Marpa Rangjung Dorje...

Perdizes

Questa voce sull'argomento centri abitati del Minas Gerais è solo un abbozzo. Contribuisci a migliorarla secondo le convenzioni di Wikipedia. Segui i suggerimenti del progetto di riferimento. Perdizescomune Perdizes – Veduta LocalizzazioneStato Brasile Stato federato Minas Gerais MesoregioneTriângulo Mineiro e Alto Paranaíba MicroregioneAraxá AmministrazioneSindacoFernando Marangoni TerritorioCoordinate19°21′07″S 47°17′37″W19°21′07″S, 47°17′37″W (Pe...

 

Sahel

Biogeographical region in Africa For other uses, see Sahel (disambiguation). Not to be confused with Sahul. SahelThroughout the Sahel, rammed earth construction is widespread, as exemplified by this medieval mosque in Burkina FasoSahel savanna and its namesake acacias at the beginning of the short summer rainy seasonThe Sahel region in Africa: a belt up to 1,000 km (620 mi) wide that spans 5,400 km (3,360 mi) from the Atlantic Ocean to the Red SeaEcologyRealmAfrotropicalBi...