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85820 (1998 XP9)
Classification: Main-belt Asteroid          SPK-ID: 2085820
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08491713435984453 3.8219e-08  
a 3.021018865806787 2.1152e-08 au
q 2.764482600875447 1.2149e-07 au
i 11.53417253178106 5.8159e-06 deg
node 69.46865339127885 2.7739e-05 deg
peri 48.69739762769616 5.5628e-05 deg
M 350.0718941946977 4.5578e-05 deg
tp 2459053.392303226133
(2020-Jul-22.89230323)
0.00024284 TDB
period 1917.911587045993
5.25
2.0143e-05
5.515e-08
d
yr
n .1877041686548646 1.9714e-09 deg/d
Q 3.277555130738127 2.2949e-08 au
  Orbit Determination Parameters
   # obs. used (total)      702  
   data-arc span      7719 days (21.13 yr)  
   first obs. used      1998-12-11  
   last obs. used      2020-01-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58328  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 20:39:14  

Additional Information
 Earth MOID = 1.79628 au 
 Jupiter MOID = 1.92549 au 
 T_jup = 3.210 
[ 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 14.4   n/a MPO453289  
diameter diameter 3.379 km 0.969 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.323   0.140 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

85820 (1998 XP9)          Discovered 1998-Dec-14 by Korlevic, K. at Visnjan
Reference: 20040830/Numbers.arcLast Updated: 2004-09-06

[ 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
1902-Jul-24 16:12 00:04 Jupiter 1.93958013665804 1.93957953765192 1.93958073566417 2.76871860484508 2.60622228474899 2415955.175015179 3.87178356604588 209.555699493003 21.4783780811991 82.4847347285894 2621808.52270325 T 21 CATAB v2.0f-lin.ifort 2020-Feb-23 20:39:31 2020-Feb-23 20:39
1949-Sep-09 22:50 00:02 Jupiter 1.95019505528439 1.95019447654757 1.9501956340211 3.00147888468122 2.85310731367996 2433169.451214066 2.20931147044563 131.674593662438 20.7667265730524 83.1959903663958 2488596.69178011 T 21 CATAB v2.0f-lin.ifort 2020-Feb-23 20:39:31 2020-Feb-23 20:39
1996-Oct-30 10:50 < 00:01 Jupiter 1.97623255600996 1.97623201909009 1.97623309293005 3.27600148972015 3.14244751860576 2450386.951208302 0.684041613466489 73.8619543815867 16.9083645783907 77.3267124700499 2740099.18716723 T 21 CATAB v2.0f-lin.ifort 2020-Feb-23 20:39:31 2020-Feb-23 20:39
2034-Nov-15 08:42 < 00:01 Jupiter 1.97310299797432 1.97310231128145 1.97310368466708 3.67053662413337 3.55165737754591 2464281.862350246 0.663281281828592 134.283921387418 27.1896747534207 -87.6783436983028 1929166.37751041 T 21 CATAB v2.0f-lin.ifort 2020-Feb-23 20:39:31 2020-Feb-23 20:39
2082-Jan-04 17:36 00:02 Jupiter 1.95015206775338 1.95015138357024 1.95015275193686 3.26708813488371 3.13132425363372 2481499.233521979 2.22186829099823 198.215092563254 24.7606832772652 -88.1603641436223 1811134.10874677 T 21 CATAB v2.0f-lin.ifort 2020-Feb-23 20:39:31 2020-Feb-23 20:39
2129-Feb-21 06:32 00:04 Jupiter 1.93600375520941 1.9360031007703 1.93600440964929 2.897610066426 2.74246650557062 2498712.772109275 3.89607274012935 301.158606651398 24.4068220326981 -85.4970634888935 1942358.64199317 T 21 CATAB v2.0f-lin.ifort 2020-Feb-23 20:39:31 2020-Feb-23 20:39
2176-Apr-06 22:06 00:06 Jupiter 1.93712241144113 1.93712178331727 1.93712303956487 2.64142241691028 2.47034332273775 2515924.420914867 5.60360305094603 372.963976184733 26.2139503174855 -84.2004316576388 2238148.11398703 T 21 CATAB v2.0f-lin.ifort 2020-Feb-23 20:39:31 2020-Feb-23 20:39

Alternate Designations
 1998 XP9 = 2000 EQ28 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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