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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 ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09577829430013474 3.6964e-08  
a 2.899533360704108 1.3171e-08 au
q 2.621821001149531 1.0896e-07 au
i 3.371864193369348 4.1862e-06 deg
node 147.6814751667093 6.2959e-05 deg
peri 350.9991443413527 6.6867e-05 deg
M 1.493327200075167 2.1023e-05 deg
tp 2459193.019285736780
(2020-Dec-09.51928574)
0.00010531 TDB
period 1803.393880874521
4.94
1.2288e-05
3.364e-08
d
yr
n .1996236118010032 1.3602e-09 deg/d
Q 3.177245720258685 1.4432e-08 au
  Orbit Determination Parameters
   # obs. used (total)      842  
   data-arc span      11024 days (30.18 yr)  
   first obs. used      1991-01-14  
   last obs. used      2021-03-21  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .55477  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 03:11:25  

Additional Information
 Earth MOID = 1.63507 au 
 Jupiter MOID = 1.83588 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

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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 1.85552008165215 1.85551966871696 1.85552049458796 2.52593276984098 2.33823876209284 2420473.200468577 2.08197998853761 109.742237581849 8.23567376239201 -84.6651625464029 3068549.64617476 T 27 CATAB v2.0g-lin.ifort 2021-May-04 03:11:27 2021-May-04 03:11
1974-Feb-26 22:03 < 00:01 Jupiter 1.86257930343548 1.86257894883031 1.86257965804064 2.53387374240043 2.34755202164913 2442105.418497813 0.873655387826147 54.4243583102855 7.81855176214323 -86.412825440312 3130514.64915549 T 27 CATAB v2.0g-lin.ifort 2021-May-04 03:11:27 2021-May-04 03:11
1999-Sep-21 12:41 < 00:01 Jupiter 1.98347535746972 1.98347495028087 1.98347576465858 3.30315316996285 3.1712366162856 2451443.028393241 0.364540506272992 36.5750480824185 13.2423769416541 80.1243304656538 3355403.41789382 T 27 CATAB v2.0g-lin.ifort 2021-May-04 03:11:27 2021-May-04 03:11
2033-May-19 20:31 < 00:01 Jupiter 1.87188575196841 1.87188541491438 1.87188608902245 2.55106291428072 2.36705052346611 2463737.354605133 0.415493583860801 39.6753943580601 7.87616639752172 -87.4638801931394 3226900.62966573 T 27 CATAB v2.0g-lin.ifort 2021-May-04 03:11:27 2021-May-04 03:11
2058-Dec-13 04:30 < 00:01 Jupiter 1.9614882394358 1.96148776097181 1.96148871789979 3.19241905048715 3.05415888351917 2473075.687822946 0.889937179340169 54.3992694898522 12.6196315057428 78.9185379929357 3100185.21986458 T 27 CATAB v2.0g-lin.ifort 2021-May-04 03:11:27 2021-May-04 03:11
2092-Aug-09 12:42 00:02 Jupiter 1.88327500741336 1.88327451305574 1.8832755017714 2.57734609715599 2.39649579900095 2485369.029456229 1.59678362714684 79.0722106781623 9.43858184242937 -80.2330877248996 3254835.11867956 T 27 CATAB v2.0g-lin.ifort 2021-May-04 03:11:27 2021-May-04 03:11
2118-Mar-06 11:49 00:02 Jupiter 1.94073646091864 1.94073570073689 1.94073722110193 3.08888928143801 2.94420605157534 2494707.992038242 2.09235784017442 111.1981987169 12.0272449027052 78.3711631058867 2966999.67848068 T 27 CATAB v2.0g-lin.ifort 2021-May-04 03:11:27 2021-May-04 03:11
2151-Nov-01 01:00 00:03 Jupiter 1.89660741244954 1.89660659713394 1.89660822776718 2.61255843499598 2.43562395787057 2507000.541774039 2.80765105061025 123.834760627193 10.2200298945214 -77.3441555012367 3277156.04795356 T 27 CATAB v2.0g-lin.ifort 2021-May-04 03:11:27 2021-May-04 03:11
2177-May-27 13:23 00:03 Jupiter 1.92118422882103 1.92118318845633 1.92118526919031 2.99278634635459 2.84165424765085 2516340.057870889 3.30819009084431 175.320230789914 11.2258435405682 79.6679838363894 2920606.743206 T 27 CATAB v2.0g-lin.ifort 2021-May-04 03:11:27 2021-May-04 03:11

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