Oblako, skopleniya i kometa Saiding-Spring
4.09.2014 | Astronomicheskaya kartinka dnya

19 oktyabrya samym horoshim mestom dlya nablyudeniya komety Saiding-Spring budet Mars. Imenno togda etot vozvrashayushiisya posetitel' vnutrennih chastei Solnechnoi sistemy pod imenem C/2013 A1, otkrytyi v yanvare 2013 goda Robertom MakNotom v avstraliiskoi observatorii Saiding-Spring, proletit v 132 000 kilometrov ot Krasnoi planety. Takoe sblizhenie ravno primerno 1/3 rasstoyaniya mezhdu Zemlei i Lunoi.

• >> Oblako, skopleniya i kometa Saiding-Spring   (Astronomicheskaya kartinka dnya, 4.09.2014, 1.4 KBait, otvetov: 2) 19 oktyabrya samym horoshim mestom dlya nablyudeniya komety Saiding-Spring budet Mars. Imenno togda etot vozvrashayushiisya posetitel' vnutrennih chastei Solnechnoi sistemy pod imenem C/2013 A1, otkrytyi v yanvare 2013 goda Robertom MakNotom v avstraliiskoi observatorii Saiding-Spring, proletit v 132 000 kilometrov ot Krasnoi planety. Takoe sblizhenie ravno primerno 1/3 rasstoyaniya mezhdu Zemlei i Lunoi. Odnako uzhe seichas kometa predstavlyaet iz sebya potryasayushee zrelishe dlya zhitelei yuzhnogo polushariya Zemli. Etot teleskopicheskii snimok, sdelannyi 29 avgusta, zapechatlel belesuyu komu komety i ee zakruglennyi pylevoi hvost, protyanuvshiisya cherez yuzhnoe nebo. Na skazochnom nebesnom peizazhe takzhe vidny Maloe Magellanovo oblako i sharovye zvezdnye skopleniya 47 Tukana (sprava) i NGC 362 (sleva vverhu). Vy bespokoites' za vse te kosmicheskie apparaty, letayushie po orbite vokrug Marsa? Deistvitel'no, pylevye chasticy komety mogut nanesti usherb apparatam, poetomu upravlyayushie imi tehniki planiruyut pomestit' apparaty na obratnuyu storonu planety vo vremya blizkogo proleta komety.

• Re: Oblako, skopleniya i kometa Saiding-Spring   (A. V. Talikov, 6.09.2014 13:51, 2.8 KBait) Orbital characteristics[1] Epoch August 27, 2011 (2455800.5) Aphelion2.29608 AU (Q) Perihelion0.967688 AU (q) Semi-major axis 1.6319 AU (a) Eccentricity0.40701 Orbital period 2.0847 yr (761.4 d) Mean anomaly 201.5 Inclination0.9267 Longitudeof ascendingnode 47.505 Argumentof perihelion 204.0673 Physical characteristics Dimensions12×24 m Mass5×106 kg Sidereal rotation period 42.7 s (0.01185 h) Absolute magnitude(H) 25.7[1] Sblizheniya povtoryayutsya raz v 2 goda, bolee tesnye v 25 let. Uskorenie vrasheniya ___sootvetstvuet tyazhesti na asteroide v 100.000 bol'shem, naprimer na Cerere. Energiya vrasheniya 5 MDzh ili 1,5 kVt*ch. Mozhno zapustit' na niti kilogrammovyi ob''ekt so skorost'yu v 3 km/sek za schet vrasheniya asteroida. Zapas prochnosti kak u polmetrovoi sosul'ki. Vozmozhno vytyanutaya forma svidetel'stvuet o tekuchesti sostavlyayushego kometu l'da. Rasstoyanie do perigeliya ot orbity Zemli ne bolee 8 mln km, a mezhdu orbitami ok. 2,5 mln km. Esli na peresadku zatrachivat' pol-nedeli(ergonoma do Luny), potrebuetsya summarnyi impul's ot OZO v 20 km/sek, a pri otsutstvii nakloneniya byl by 6 km/ sek. Zato ekonomim massu zashity ot kosmicheskoi radiacii i ot sobstvennogo _reaktora - reaktor stavim za gorkoi, gorke vyrezaem rot, a rtu yazyk, poluchayutsya zuby - zhivem na meste yazyka, prikryvayas' zubami. 3 mm svinca oslablyayut izluchenie v 2 raza, 3 sm - v 1000 raz, chto uvelichivaet prodolzhitel'nost' poleta s pol-nedeli do 10 let. Massa zashity ob''ema diametrom 5 m 2.5 t, no uchityvaya' chto polovina lunnyh astronavtov umerla, zashitu sleduet uvelichit' do fonovoi smertnosti 1% god, a dlya zdorovyakov-kosmonavtov 0,5% god ili v 10 raz, chto sootvetstvuet troinoi tolshine ili 8 t svinca, a dlya diametra 10 m - 30-35 t. Yasno, chto zashita asteroidom massoi 5 tys t mogla by nam s''ekonomit' neskol'ko stupenei. Na odnu stupen' s impul'som 4 km/sek idet 2,7 krat massy. Vot stepeni 2,7: 1-2,7___2-7,3___3-20___4-55___5-150___6-400 krat. Dlya polutora tonn poleznoi nagruzki massa zashity ekvivalentna 3 stupenyam rakety. Poetomu ispol'zovat' dlya zashity kometu s takim udalennym otstoyaniem nakloneniya apolonovoi orbity nevygodno. Otstoyanie nado sokratit'_ raza v dva do mln km. Zavtra proletaet podhodyashii ob,'ekt 2014-RC 2014 RC Discovery[1][2]and designation DiscoveredbyCatalina Sky Survey (703) Pan-STARRS (F51) DiscoverydateSeptember 12, 2014 Minorplanet categoryApollo asteroid, Near-Earth object Orbital characteristics Epoch December 9, 2014 Aphelion1.8041 AU Perihelion0.8207 AU Semi-major axis 1.3124 AU Eccentricity0.3747 Orbital period 1.504 years (549 days)[3] Mean anomaly 25.64 Inclination4.574 Longitudeof ascendingnode 345.01 Argumentof perihelion 71.19 EarthMOID0.000034AU (5,100km; 3,200mi) (0.013 LD) Physical characteristics Dimensions1032m (33105ft)[4] Absolute magnitude(H) 26.8[3]
• Re: Oblako, skopleniya i kometa Saiding-Spring   (Darina75 Darina75, 4.05.2015 12:58, 434 Bait) Spasibo vam bol'shoe za etot zamechatel'nyi forum, kotoryi ya nahozhu ochen' interesnym takzhe s krasivym interfeisom, udobnoi navigacii. Eto deistvitel'no zdorovo! Pozdravlyaem i zhelaem udachi.
  
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