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Demokloid

Vikipedi, özgür ansiklopedi

Demokloid, bir türküçük gezegengrubuna verilen genel isimdir.5335 Demokles ve1996 PW gibi küçük gezegenler, yüksekdışmerkezliğe sahip uzun dönemli yörüngeleri olan fakatkoması veya kuyruğu olmayankuyruklu yıldızlar bu sınıfa dahil edilmektedir.David Jewitt bir Demokloid'iJüpiter'e göreTisserand parametresi 2 ya da daha az olan bir cisim olarak tanımlarken,[1]Akimasa Nakamura bu grubu aşağıdakiyörünge elemanları uyarınca tanımlamaktadır:

  • q < 5.2 AU,a > 8.0 AU vee > 0,75,
  • veya alternatif olarak,i > 90°

Ancak bu tanım, Jüpiter'e odaklanmamakta ve(127546) 2002 XU93,2003 WG166 ve2004 DA62 gibi cisimleri kapsamamaktadır.[2]

Jüpiter'e göre Tisserand parametresinin 2 veya daha az hesaplanması neticesinde Nisan 2023 itibarıyla 258 adet demokloid adayı bulunmaktadır.[3] Bu nesnelerden yörüngegözlem yayı 30 günden daha büyük olanlarının sayısı ise 240'tır.[3] Bu cisimler astronomik fotografide kırmızımsı görünmekle birlikte, diğerKuiper kuşağı cisimleri ya da centaurlar kadar kırmızı renk vermezler. Diğer demokloidler arasında;2013 BL76,2012 DR30,2008 KV42,(65407) 2002 RP120 ve20461 Dioretsa bulunmaktadır.

Halley kuyrulu yıldızı ve(343158) 2009 HC82 adlı demokloid gibiters yön yörüngeli cisimler Dünya'ya oranla 81 km/s (290.000 km/sa) hızda hareket edebilirler.[4]

Demokloid adı,5335 Demokles adlı küçük gezegenin de adlandırıldığı gibi Yunan mitolojik kahramanıDemokles'ten gelmektedir.

Köken

[değiştir |kaynağı değiştir]

Demokloidlerin Halley tipi kuyruklu yıldızların uçucu materyallerinigaz çıkışı vesönme nedeniyle kaybedençekirdekler olabileceği düşünülmektedir. MuhtemelenOort bulutu kökenlidirler. Bu iddiayı güçlendiren bir diğer kanıt ise demokloid tanımına girebileceği düşünülen bazı cisimlerin kuyruklu yıldız benzeri kuyruklarının bulunmasıdır. Bu kapsamdaki bazı kuyruklu yıldızlar C/2001 OG108 (LONEOS),C/2002 CE10,C/2002 VQ94,C/2004 HV60 ve diğerleridir. Diğer küçük gezegenlerden farklı olarak demokloidlerin ters yön yörüngeye sahip olduğunu gösterir kanıtlar da bu iddiayı güçlendirmektedir. Yörünge eğikliği 90 ila 180 derece arasındaki nesneler ters yön yörüngeyle hareket etmektedirler.

Liste

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Nisan 2023 itibarıyla JPL SBDB'den alınan listede Akimasa Nakamura'nın damokloid olarak sınıflandırılma kriterlerini karşılayan cisimler aşağıda listelenmektedir. Tisserand'ın Jüpiter'e göre parametresi (TJüpiter) de ayrıca verilmiştir. Akimasa Nakamura'nın kriterleri ve Tisserand parametresi büyük ölçüde birbirini tutmaktadır.

Damokloidlerin çoğu MPC'nin diğer olağandışı küçük gezegenler listesinde de yer almaktadır.[5] Yörünge verileri JPL tarafından numaralandırılmış ve numaralandırılmamış element dosyalarından elde edilmiştir.[3]

İsimea(AU)q(AU)i(°)Q(AU)DSYılTjüpSınıfKaynak
5335 Damocles 1991 DA0,865911,871,59261,6822,1540,91,16CENMPC · JPL
15504 1999 RG330,77359,3652,12134,9816,6128,71,95CENMPC · JPL
20461 Dioretsa 1999 LD310,901623,822,344160,4345,29116-1,53CENMPC · JPL
65407 2002 RP1200,953953,912,484119,51105,34396-0,855NÖCMPC · JPL
154783 2004 PA440,75814,253,4493,2725,0553,82,52CENMPC · JPL
606187 2017 QO330,858434,884,94148,8464,81206-2,12NÖCMPC · JPL
614592 2009 YS60,91920,221,637147,7738,890,9-1,06CENMPC · JPL
1996 PW0,9909275,72,51830,02548,845801,72NÖCMPC · JPL
1997 MD100,943326,531,50459,1951,551370,964CENMPC · JPL
1998 QJ10,814511,242,08523,620,437,72,03CENMPC · JPL
1998 WU240,907915,131,39442,5728,8658,81,4CENMPC · JPL
2000 AB2290,95651,992,28568,43101,693750,781NÖCMPC · JPL
2000 DG80,791610,782,246129,3719,3135,4-0,633CENMPC · JPL
2000 HE460,901123,622,335158,5344,91115-1,5CENMPC · JPL
2000 KP650,962689,123,3345,49174,928411,63NÖCMPC · JPL
2002 AR910,965275,232,61717,57147,846531,96NÖCMPC · JPL
2002 RN1090,9957627,42,67158,471252,09157001,07NÖCMPC · JPL
2003 UY2830,895433,263,47918,8863,051922,29NÖCMPC · JPL
2003 WN1880,845614,382,2226,9126,5354,51,94CENMPC · JPL
2004 CM1110,8533,174,9744,6961,371912,81NÖCMPC · JPL
2004 NN80,9769100,92,33165,57199,51010-1,77NÖCMPC · JPL
2005 HL30,830311,291,91735,5520,6737,91,8CENMPC · JPL
2005 OE0,951263,333,08867,51123,585040,905NÖCMPC · JPL
2005 SB2230,905629,442,77891,6756,11600,118CENMPC · JPL
2005 UH5250,907617,781,64314,2233,9174,91,8CENMPC · JPL
2005 VX30,9951835,84,116112,591667,5224200-0,959NÖCMPC · JPL
2006 BZ80,80189,6081,905165,317,3129,8-1,03CENMPC · JPL
2006 EX520,938742,042,579150,3381,51273-1,58NÖCMPC · JPL
2006 LM10,88532,193,702172,1460,67183-2,13NÖCMPC · JPL
2006 RG10,920825,762,04133,3649,48131-0,99CENMPC · JPL
2006 RJ20,75889,6792,335164,6717,0230,1-1,18CENMPC · JPL
2006 SO1340,832119,573,2854,235,8686,62,41CENMPC · JPL
2007 DA610,9936414,52,64176,57826,3984400,48NÖCMPC · JPL
2007 TG2500,925921,291,57810,594198,21,75CENMPC · JPL
2007 VJ2000,941224,351,4317,1647,271201,66CENMPC · JPL
2008 BN180,91430,342,60928,7858,071671,89NÖCMPC · JPL
2008 SE820,835319,43,19517,4535,6185,52,29CENMPC · JPL
2008 WA950,878914,011,69760,3626,3252,41,15CENMPC · JPL
2009 AU160,917323,511,94570,1445,071140,797CENMPC · JPL
2009 DD470,948142,482,204107,2682,75277-0,416NÖCMPC · JPL
2009 FW230,856411,51,65286,421,36390,549CENMPC · JPL
2009 KK310,922820,041,54722,8238,5489,71,65CENMPC · JPL
2009 QY60,832912,492,087137,9222,8944,1-0,856CENMPC · JPL
2009 SE80,901613,261,30418,0125,2148,31,71CENMPC · JPL
2009 WX1990,955131,31,4068,7361,21751,6NÖCMPC · JPL
2010 BA1010,83289,1271,52626,5516,7327,61,88CENMPC · JPL
2010 CG550,909131,582,872146,160,29177-1,54NÖCMPC · JPL
2010 CH2470,77810,42,3099,6518,4933,52,25CENMPC · JPL
2010 DD570,9883227,52,6538,32452,2834302,02NÖCMPC · JPL
2010 EB460,955233,251,491156,365,02192-1,21NÖCMPC · JPL
2010 EJ1040,921,532,15241,3640,999,91,57CENMPC · JPL
2010 ER1440,827410,891,888,8319,91362,08CENMPC · JPL
2010 EX1750,946349,392,65229,2196,143471,84NÖCMPC · JPL
2010 GW640,940661,893,679105,27120,1487-0,533NÖCMPC · JPL
2010 HR680,875712,421,54521,923,343,81,8CENMPC · JPL
2010 HK1260,831616,562,788121,9230,3267,4-0,733CENMPC · JPL
2010 JH1240,962269,892,64553,37137,145841,27NÖCMPC · JPL
2010 JC1470,761614,573,47341,6825,6655,61,98CENMPC · JPL
2010 JA1910,792510,022,07915,1517,9631,72,15CENMPC · JPL
2010 LN1350,999761791,7364,7312357,254860000,697NÖCMPC · JPL
2010 MK190,804614,862,90425,6326,8157,32,16CENMPC · JPL
2010 OR10,923427,092,075143,9152,11141-1,22CENMPC · JPL
2010 OU1000,890617,291,89215,2232,771,91,9CENMPC · JPL
2010 OM1010,917926,22,151118,7750,24134-0,658CENMPC · JPL
2010 PK160,904818,821,79227,735,8581,61,71CENMPC · JPL
2011 BL400,83159,991,6843,3618,331,62,06CENMPC · JPL
2011 OR170,9894293,53,115110,25583,95030-0,738NÖCMPC · JPL
2011 SP250,883719,642,285109,323787,1-0,337CENMPC · JPL
2011 UR4020,777918,494,10624,5932,8779,52,44CENMPC · JPL
2011 WS410,944937,412,062141,7272,76229-1,24NÖCMPC · JPL
2012 HD20,959161,942,533146,67121,35488-1,55NÖCMPC · JPL
2012 KA510,9903502,14,87170,89999,27113000,904NÖCMPC · JPL
2012 TF720,864111,141,5145,320,7637,21,93CENMPC · JPL
2012 TT720,86059,5811,3375,0617,8329,71,92CENMPC · JPL
2012 TL1390,881529,973,553160,0456,4164-1,96CENMPC · JPL
2012 VG940,829810,571,7988,4619,3434,42,07CENMPC · JPL
2013 BN270,973958,831,537101,8116,12451-0,224NÖCMPC · JPL
2013 HS1500,951357,562,80297,04112,32437-0,161NÖCMPC · JPL
2013 JD40,863911,981,6372,9122,3241,50,884CENMPC · JPL
2013 LD160,968680,332,524154,61158,14720-1,7NÖCMPC · JPL
2013 LG290,789717,063,58715,3530,5370,52,45CENMPC · JPL
2013 NS110,785312,582,7130,4522,4544,6-0,835CENMPC · JPL
2013 PS210,835711,011,80911,2520,2236,52,04CENMPC · JPL
2013 RA960,920419,841,585,1838,188,41,78CENMPC · JPL
2013 YG480,7528,1612,02461,3914,323,31,43CENMPC · JPL
2014 CW140,867932,654,314170,7560,99187-2,3NÖCMPC · JPL
2014 HR710,951141,562,03461,8381,082680,95NÖCMPC · JPL
2014 MH550,899444,734,592,2884,962990,014NÖCMPC · JPL
2014 QZ1110,865212,181,64115,8522,7242,51,9CENMPC · JPL
2014 QW2430,75968,2561,98518,1414,5323,72,19CENMPC · JPL
2014 QU2500,86712,331,649,0923,0243,31,94CENMPC · JPL
2014 SQ3390,90328,912,803128,5755,02155-1,08CENMPC · JPL
2014 UG60,889212,41,3747,0723,4343,71,82CENMPC · JPL
2014 UC2410,75649,5852,3357,3616,8329,72,3CENMPC · JPL
2014 XS30,954972,273,259101,64141,28614-0,374NÖCMPC · JPL
2015 AO440,833921,833,624139,9340,03102-1,49CENMPC · JPL
2015 AM1070,874512,791,6057,0823,9745,71,92CENMPC · JPL
2015 BE3840,8089,3521,7960,3416,9128,62,14CENMPC · JPL
2015 BH5260,877416,732,0518,3531,468,42,01CENMPC · JPL
2015 FK370,9888441,34,935156,12877,739270-2,5NÖCMPC · JPL
2015 KJ870,885911,981,3678,222,5841,41,83CENMPC · JPL
2015 RK2450,966482,132,76191,8161,49744-0,001NÖCMPC · JPL
2015 RE2770,765420,264,7531,6235,7791,22,8CENMPC · JPL
2015 TP100,901914,211,39437,9527,0353,61,49CENMPC · JPL
2015 TN1780,956154,212,38291,26106,043990,054NÖCMPC · JPL
2015 TS3500,965144,95,0757,91284,6717401,51NÖCMPC · JPL
2015 XX3510,852114,452,136159,1826,7654,9-1,27CENMPC · JPL
2015 XR3840,901136,183,577157,4868,78218-1,97NÖCMPC · JPL
2015 YY180,829919,313,283118,2735,3384,8-0,748CENMPC · JPL
2016 AT2810,956662,032,69422,18121,374891,95NÖCMPC · JPL
2016 CJ1550,764613,293,1297,8123,4548,52,43CENMPC · JPL
2016 CO2640,935846,963,015129,7490,91322-1,24NÖCMPC · JPL
2016 EJ2030,958265,172,721170,96127,62526-1,92NÖCMPC · JPL
2016 GE530,874910,771,3470,5820,1935,31,88CENMPC · JPL
2016 GZ1200,831410,721,80810,4819,6335,12,05CENMPC · JPL
2016 NL1000,759913,933,34521,9224,52522,35CENMPC · JPL
2016 PN660,906631,162,911105,2759,41174-0,377NÖCMPC · JPL
2016 US1090,94835,661,85487,3669,472130,223NÖCMPC · JPL
2016 UK2120,950229,621,4762,2857,771611,66CENMPC · JPL
2016 UN2320,861930,394,19911,1756,591682,58NÖCMPC · JPL
2016 UN2330,936624,861,5771,448,141241,74CENMPC · JPL
2016 UG2450,83018,4721,4392,3415,524,72,04CENMPC · JPL
2016 VY170,850111,171,674148,5320,6637,3-0,85CENMPC · JPL
2016 WS10,882314,331,68753,1426,9854,31,3CENMPC · JPL
2017 AX130,883628,623,332137,2353,9153-1,43CENMPC · JPL
2017 CW320,9832174,82,943152,43346,72310-1,85NÖCMPC · JPL
2017 EM40,920132,922,62983,4263,211890,384NÖCMPC · JPL
2017 GD80,946842,852,28174,8383,432810,605NÖCMPC · JPL
2017 JB60,884232,953,814160,8562,08189-2,06NÖCMPC · JPL
2017 MZ40,952767,793,20465,81132,385580,975NÖCMPC · JPL
2017 MB70,996311874,44655,842370,31409001,47NÖCMPC · JPL
2017 OX680,970758,71,72394,72115,68450-0,044NÖCMPC · JPL
2017 PY240,925117,411,30471,7533,5272,60,734CENMPC · JPL
2017 RR20,782911,652,52987,0520,7639,70,543CENMPC · JPL
2017 SV130,79149,6722,017113,3117,3330,1-0,122CENMPC · JPL
2017 SN330,9926251,31,856152,08500,73980-1,47NÖCMPC · JPL
2017 SZ1180,954134,081,5642,4666,61991,68NÖCMPC · JPL
2017 UW510,9751126,63,148144,23250,021420-1,73NÖCMPC · JPL
2017 YL20,76588,9052,08527,8615,7226,62,07CENMPC · JPL
2017 YL40,97081464,26589,02287,8317700,079NÖCMPC · JPL
2018 AS180,871112,871,6662,9824,0846,21,11CENMPC · JPL
2018 DE40,924231,572,39281,3860,751770,447NÖCMPC · JPL
2018 DF40,982993,791,60668,24185,979080,636NÖCMPC · JPL
2018 KH30,959892,513,71746,87181,318901,67NÖCMPC · JPL
2018 MP80,98973733,84268,28742,1172000,911NÖCMPC · JPL
2018 PQ180,80798,9531,721,2216,1926,82,13CENMPC · JPL
2018 PL280,861319,472,774,1236,2485,90,805CENMPC · JPL
2018 SQ130,9809155,72,97690,98308,411940-0,003NÖCMPC · JPL
2018 TL60,78848,1471,724170,9214,5723,3-0,881CENMPC · JPL
A/2018 V30,989121,41,34164,98241,551340-1,34NÖCMPC · JPL
A/2018 W30,99427354,292104,81465,7919900-0,648NÖCMPC · JPL
A/2019 G20,9967699,82,291159,211397,4118500-1,75NÖCMPC · JPL
A/2019 G30,833617,162,854156,8131,4671,1-1,54CENMPC · JPL
2019 KN190,763812,352,91514,7521,7743,42,34CENMPC · JPL
A/2019 N20,998210591,94589,432115,35344000,022NÖCMPC · JPL
A/2019 O40,889232,883,644115,0962,12189-0,817NÖCMPC · JPL
2019 PN20,920325,242,012113,0448,47127-0,468CENMPC · JPL
A/2019 T10,888138,254,282120,8772,22237-1,14NÖCMPC · JPL
2019 YJ60,930836,992,5592271,432251,95NÖCMPC · JPL
A/2020 A10,935625,941,671149,0550,21132-1,15CENMPC · JPL
A/2020 B10,966652,321,74818,51102,883781,64NÖCMPC · JPL
2020 EP0,763710,472,47576,418,4733,90,927CENMPC · JPL
2020 FH240,802616,923,3427,5330,4969,62,21CENMPC · JPL
A/2020 H90,9925341,52,578137,85680,426310-1,46NÖCMPC · JPL
2020 KD60,870813,011,6838,6724,3446,91,61CENMPC · JPL
2020 KU70,87934,694,195103,8365,18204-0,439NÖCMPC · JPL
2020 KX110,946861,013,24472,58118,774770,745NÖCMPC · JPL
2020 ML10,954155,282,53882,49108,024110,349NÖCMPC · JPL
2020 OP70,894428,4379,4753,811510,565CENMPC · JPL
2020 QN60,9913552,34,82876,831099,85130000,629NÖCMPC · JPL
2020 QO60,875619,222,39180,4936,0684,30,578CENMPC · JPL
2020 SJ50,856418,282,62577,433,9378,10,707CENMPC · JPL
2020 SV790,884117,522,035,7433,0273,42CENMPC · JPL
2020 TK90,878320,492,494105,5738,4992,8-0,256CENMPC · JPL
2020 XQ70,917523,471,93532,47451141,65CENMPC · JPL
2021 DL10,888135,143,933148,5466,35208-1,89NÖCMPC · JPL
2021 DN20,81922,013,98410,8340,041032,56CENMPC · JPL
A/2021 E20,9894216,42,288167,49430,463180-1,8NÖCMPC · JPL
A/2021 E40,9936725,84,676116,361447,0119600-1,18NÖCMPC · JPL
2021 FQ20,791910,772,24154,9319,335,31,49CENMPC · JPL
2021 GQ570,960286,893,455125,1170,33810-1,25NÖCMPC · JPL
2021 LB180,869525,753,361128,9648,14131-1,18CENMPC · JPL
2021 LU440,844929,574,58643,7854,551612,02CENMPC · JPL
2021 NS710,905437,363,53520,3871,182282,27NÖCMPC · JPL
2021 PN720,9857316,24,52584,79627,8756200,255NÖCMPC · JPL
2021 RM1140,9618105,44,024103,18206,691080-0,512NÖCMPC · JPL
2021 TR810,83258,7681,46836,8316,07261,75CENMPC · JPL
2021 UL190,949837,031,858154,9272,19225-1,37NÖCMPC · JPL
2021 VQ80,78919,3281,96723,2516,6928,52,07CENMPC · JPL
2021 VU110,76814,173,28911,8725,0653,42,44CENMPC · JPL
2021 XZ30,781514,223,107172,0925,3353,6-1,68CENMPC · JPL
2021 XS60,89938,923,93396,9173,91243-0,155NÖCMPC · JPL
2022 AA70,806211,712,269122,4121,1440,1-0,507CENMPC · JPL
2022 AB80,978778,851,67775,13156,037000,476NÖCMPC · JPL
2022 AC80,807213,592,619153,1524,5650,1-1,32CENMPC · JPL
2022 AZ90,906952,214,86373,4299,563770,861NÖCMPC · JPL
A/2022 B30,9962980,53,698132,061957,2530700-1,59NÖCMPC · JPL
2022 CT70,783210,532,28379,2618,7834,20,824CENMPC · JPL
2022 GU0,952937,091,746116,9172,43226-0,592NÖCMPC · JPL
2022 GK110,809222,824,355102,4141,29109-0,301CENMPC · JPL
2022 HB50,904536,73,506147,1869,9222-1,76NÖCMPC · JPL
2022 JK50,93843,342,68716,8383,992852,04NÖCMPC · JPL
2022 OC210,951568,933,34493,38134,51572-0,056NÖCMPC · JPL
2022 UH420,75599,8082,39424,6117,2230,72,17CENMPC · JPL
2022 YU90,78869,0151,906172,7516,1227,1-1,03CENMPC · JPL
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Kaynakça

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  1. ^"Dave Jewitt: Damocloids".www2.ess.ucla.edu. 28 Ağustos 2009 tarihindekaynağından arşivlendi. Erişim tarihi:5 Nisan 2023. 
  2. ^Jewitt, David (Ocak 2005)."A First Look at the Damocloids".The Astronomical Journal (İngilizce).129 (1): 530-538.doi:10.1086/426328.ISSN 0004-6256. 5 Nisan 2023 tarihinde kaynağındanarşivlendi. Erişim tarihi:5 Nisan 2023. 
  3. ^abc"Small-Body Database Query".ssd.jpl.nasa.gov. 27 Eylül 2021 tarihindekaynağından arşivlendi. Erişim tarihi:5 Nisan 2023. 
  4. ^"Center for NEO Studies".cneos.jpl.nasa.gov. 27 Ocak 2017 tarihindekaynağından arşivlendi. Erişim tarihi:5 Nisan 2023. 
  5. ^"List Of Other Unusual Objects".www.minorplanetcenter.net. 1 Ekim 2012 tarihindekaynağından arşivlendi. Erişim tarihi:5 Nisan 2023. 

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