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30785 Greeley (1988 PX)
Classification: Mars-crossing Asteroid          SPK-ID: 2030785
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3442081138513274 5.0352e-08  
a 2.200886260765976 1.1041e-08 au
q 1.443323352146418 1.1143e-07 au
i 5.402166569121563 7.1105e-06 deg
node 13.3806661821107 5.2491e-05 deg
peri 308.945713251223 5.3569e-05 deg
M 25.36475100280598 1.5777e-05 deg
tp 2459312.472212512323
(2021-Apr-07.97221251)
5.1775e-05 TDB
period 1192.600057150852
3.27
8.9739e-06
2.457e-08
d
yr
n .3018614646556767 2.2714e-09 deg/d
Q 2.958449169385533 1.4841e-08 au
  Orbit Determination Parameters
   # obs. used (total)      311  
   data-arc span      12025 days (32.92 yr)  
   first obs. used      1988-08-13  
   last obs. used      2021-07-16  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .58252  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 16:00:48  

Additional Information
 Earth MOID = .439346 au 
 Jupiter MOID = 2.40084 au 
 T_jup = 3.580 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.53   n/a E2021B10  

30785 Greeley           Discovered 1988 Aug. 13 by C. S. Shoemaker and E. M. Shoemaker at Palomar.
Ronald Greeley (b. 1939) has been involved in lunar and planetary studies since 1967. His current research focuses on understanding planetary surface processes and geological histories and involves a combination of spacecraft data analysis, laboratory experiments and geological field studies on the earth.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20030501/MPCPages.arcLast Updated: 2003-10-02

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1939-Aug-13 23:37 < 00:01 Earth 0.437933854281155 0.437933487919219 0.437934220651083 1.79716245381998 1.79377380833139 2429489.484150562 0.859318559776401 297.348735771226 17.3694591614101 88.6960101677794 456871.166145018 T 16 CATAB v2.0g-lin.ifort 2021-Aug-25 16:00:49 2021-Aug-25 16:00
1988-Aug-18 20:46 < 00:01 Earth 0.443468201086714 0.443467782089333 0.443468620090018 2.0391387578289 2.03619014871663 2447392.365306720 0.283601293940471 118.965981288322 15.0041162965641 -83.061907572841 538672.775615996 T 16 CATAB v2.0g-lin.ifort 2021-Aug-25 16:00:49 2021-Aug-25 16:00
2001-Jul-26 01:28 < 00:01 Earth 0.489652092706493 0.489651611003969 0.489652574409184 1.42750040102836 1.42368333623232 2452116.561017813 0.14880718156321 64.8944349088565 22.9703239872662 -84.1916840384162 666914.929486613 T 16 CATAB v2.0g-lin.ifort 2021-Aug-25 16:00:49 2021-Aug-25 16:00
2037-Aug-26 10:25 < 00:01 Earth 0.453547943833762 0.453547151885977 0.453548735799787 2.32422172664811 2.32169273182192 2465296.933744235 0.3477628211655 161.064942645377 15.4389100111776 -76.9821993296662 615231.075717106 T 16 CATAB v2.0g-lin.ifort 2021-Aug-25 16:00:49 2021-Aug-25 16:00
2050-Aug-01 05:43 < 00:01 Earth 0.467262778501673 0.467261288880408 0.467264268124956 1.45973888927774 1.45582725478681 2470019.738098681 0.537760468801902 100.678861099657 51.9507848059887 -51.5834381240723 590706.669185046 T 16 CATAB v2.0g-lin.ifort 2021-Aug-25 16:00:49 2021-Aug-25 16:00
2086-Aug-30 17:16 < 00:01 Earth 0.462306763632883 0.462304532621259 0.462308994758847 2.4962110511834 2.493901105338 2483198.219455145 0.86159304799221 383.105213358334 16.0501507344764 -73.3585309918323 659442.445382404 T 16 CATAB v2.0g-lin.ifort 2021-Aug-25 16:00:49 2021-Aug-25 16:00
2099-Aug-05 18:39 00:01 Earth 0.456745775571003 0.456743489250752 0.456748061893695 1.58876373285754 1.58508768445028 2487921.277391980 1.02836170607906 129.876833149597 63.7769561150994 32.0295461938511 362732.156759843 T 16 CATAB v2.0g-lin.ifort 2021-Aug-25 16:00:49 2021-Aug-25 16:00
2135-Sep-04 04:21 00:01 Earth 0.473111550961447 0.473108130134582 0.473114971973258 2.65355233849438 2.65142911881517 2501098.681359024 1.16507363310391 498.994684085402 16.7747330695001 -70.1659372419109 707738.626537186 T 16 CATAB v2.0g-lin.ifort 2021-Aug-25 16:00:49 2021-Aug-25 16:00
2148-Aug-09 21:41 00:01 Earth 0.450417596483314 0.450415518538542 0.450419674467311 1.73485828257957 1.7314450928225 2505822.403749283 1.24055733834067 245.110652527206 34.5780264964821 65.9004557666561 420614.959973876 T 16 CATAB v2.0g-lin.ifort 2021-Aug-25 16:00:49 2021-Aug-25 16:00
2184-Sep-05 09:51 00:01 Earth 0.480367651763034 0.480363714003809 0.480371589713781 2.74959086121667 2.74757282047494 2518997.910301850 1.23807867689731 518.89019349801 17.0861765006151 -67.9028475202244 740204.533940236 T 16 CATAB v2.0g-lin.ifort 2021-Aug-25 16:00:49 2021-Aug-25 16:00
2197-Aug-10 05:24 00:01 Earth 0.448753139311073 0.448750848917371 0.44875542973985 1.74235941994157 1.7389483357782 2523719.724757845 1.262786995879 239.085391432099 38.6901799657509 62.5203146922955 414260.864379989 T 16 CATAB v2.0g-lin.ifort 2021-Aug-25 16:00:49 2021-Aug-25 16:00
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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