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21362 Dickarmstrong (1997 HS3)
Classification: Main-belt Asteroid          SPK-ID: 2021362
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 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09567374486667463 3.6561e-08  
a 2.899062189187907 1.279e-08 au
q 2.62169805294692 1.0737e-07 au
i 3.372090586296074 4.1531e-06 deg
node 147.6823601414865 6.0702e-05 deg
peri 350.9143272463123 6.467e-05 deg
M 40.69893769160046 2.0667e-05 deg
tp 2459192.671317524208
(2020-Dec-09.17131752)
0.00010342 TDB
period 1802.954323951041
4.94
1.1932e-05
3.267e-08
d
yr
n .1996722796676771 1.3214e-09 deg/d
Q 3.176426325428894 1.4014e-08 au
  Orbit Determination Parameters
   # obs. used (total)      869  
   data-arc span      11127 days (30.46 yr)  
   first obs. used      1991-01-14  
   last obs. used      2021-07-02  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .55564  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 14:59:44  

Additional Information
 Earth MOID = 1.63574 au 
 Jupiter MOID = 1.83635 au 
 T_jup = 3.278 
[ 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 15.49   n/a MPCxxxxx  
diameter diameter 4.141 km 0.337 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.071   0.022 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21362 Dickarmstrong           Discovered 1997 Apr. 30 by Spacewatch at Kitt Peak.
Richard Armstrong (1937-1991) studied radiogenic isotope geochemistry, geology of the American Cordillera, geochronology, and Earth's geochemical evolution. Name suggested by R. and P. Jedicke.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: MPC batch dated 2016-06-20Last Updated: 2016-06-21

[ 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
1914-Dec-06 16:49 00:02 Jupiter 1.85552006681324 1.85551966278545 1.85552047084155 2.52593276019931 2.33823875011595 2420473.200508315 2.02015731579986 106.358024682096 8.19553557600091 -84.75966306026 3083003.05859018 T 29 CATAB v2.0g-lin.ifort 2021-Aug-25 14:59:46 2021-Aug-25 14:59
1974-Feb-26 22:03 < 00:01 Jupiter 1.86257929127641 1.86257894229821 1.86257964025461 2.533873728418 2.34755200529233 2442105.418513111 0.848989046457414 52.88071576694 7.72461733290484 -86.7125918950395 3152602.31930602 T 29 CATAB v2.0g-lin.ifort 2021-Aug-25 14:59:46 2021-Aug-25 14:59
1999-Sep-21 12:41 < 00:01 Jupiter 1.98347536589445 1.98347496551825 1.98347576627065 3.30315318524417 3.17123663277455 2451443.028400336 0.355649919834088 35.1704173306964 13.054871795905 80.2145747447546 3393639.74702889 T 29 CATAB v2.0g-lin.ifort 2021-Aug-25 14:59:46 2021-Aug-25 14:59
2033-May-19 20:31 < 00:01 Jupiter 1.87188574562986 1.87188540926991 1.87188608198982 2.55106290807186 2.36705051612726 2463737.354594849 0.405437380702557 38.8566865074596 7.82963183544334 -87.6971473282705 3244090.26907247 T 29 CATAB v2.0g-lin.ifort 2021-Aug-25 14:59:46 2021-Aug-25 14:59
2058-Dec-13 04:30 < 00:01 Jupiter 1.9614882345918 1.96148775755698 1.96148871162661 3.19241895862006 3.05415878714414 2473075.687798860 0.864349685473297 52.7621602849294 12.5438772690761 78.5556709131049 3121219.66567994 T 29 CATAB v2.0g-lin.ifort 2021-Aug-25 14:59:46 2021-Aug-25 14:59
2092-Aug-09 12:42 00:02 Jupiter 1.88327500896789 1.88327451754188 1.88327550039432 2.57734612973777 2.39649583419642 2485369.029410750 1.54906149776287 76.9585247822752 9.43097895259271 -80.2268995981428 3278273.70533176 T 29 CATAB v2.0g-lin.ifort 2021-Aug-25 14:59:46 2021-Aug-25 14:59
2118-Mar-06 11:48 00:02 Jupiter 1.94073644528187 1.94073569610028 1.9407371944648 3.08888925039758 2.94420601781516 2494707.992007234 2.03017900784523 107.983285477129 11.9411390433276 78.2281007696406 2997020.3543346 T 29 CATAB v2.0g-lin.ifort 2021-Aug-25 14:59:46 2021-Aug-25 14:59
2151-Nov-01 01:00 00:03 Jupiter 1.89660742391958 1.89660662075466 1.89660822708643 2.61255847856176 2.43562400571007 2507000.541714116 2.72309298776881 120.312895460069 10.1994913513519 -77.2987452808674 3310010.24564052 T 29 CATAB v2.0g-lin.ifort 2021-Aug-25 14:59:46 2021-Aug-25 14:59
2177-May-27 13:23 00:03 Jupiter 1.92118420435591 1.92118318510503 1.92118522361116 2.99278625582527 2.84165415033102 2516340.057815343 3.20932904825536 170.220916658244 11.1586498453423 79.5967513990423 2949260.17524628 T 29 CATAB v2.0g-lin.ifort 2021-Aug-25 14:59:46 2021-Aug-25 14:59

Alternate Designations
 1997 HS3 = 1995 YX11 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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