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21873 Jindrichuvhradec (1999 UU3)
Classification: Main-belt Asteroid          SPK-ID: 2021873
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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2061616529229885 3.3707e-08  
a 3.15476930697592 1.7552e-08 au
q 2.504376852059054 1.1092e-07 au
i 4.461235326424132 3.8066e-06 deg
node 238.0298009509321 4.9419e-05 deg
peri 130.5274099309205 5.0436e-05 deg
M 265.9769453718633 1.2205e-05 deg
tp 2459535.041826036134
(2021-Nov-16.54182604)
7.2376e-05 TDB
period 2046.679488707246
5.60
1.708e-05
4.676e-08
d
yr
n .1758946635202704 1.4679e-09 deg/d
Q 3.805161761892787 2.1171e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1740  
   data-arc span      13900 days (38.06 yr)  
   first obs. used      1982-09-19  
   last obs. used      2020-10-09  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49248  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 01:54:29  

Additional Information
 Earth MOID = 1.50672 au 
 Jupiter MOID = 1.69795 au 
 T_jup = 3.169 
[ 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 13.1   n/a MPO302198  
diameter diameter 7.183 km 0.136 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 50.587 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.237   0.088 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21873 Jindřich{u°}vhradec           Discovered 1999 Oct. 29 by J. Ticha and M. Tichy at Klet.
Jindřich{u°}v Hradec is the pleasant south Bohemian town founded in the thirteenth century, known for its Renaissance château and provost's Gothic church situated precisely on the fifteenth meridian east of Greenwich, as a line across its paving stones shows.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20020128/MPCPages.arcLast Updated: 2003-10-02

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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
1935-Aug-04 14:10 00:02 Jupiter 1.90828265210522 1.90828164697813 1.9082836572335 2.69513481976561 2.52507800544188 2428019.089936920 2.23701619536635 106.384678093013 14.8071407740645 -77.9819212942286 2507528.37617193 T 24 CATAB v2.0f-lin.ifort 2020-Nov-13 01:54:33 2020-Nov-13 01:54
1946-Apr-11 08:20 00:02 Jupiter 1.74237816368423 1.74237771842044 1.74237860894831 1.77313197411915 1.47368135841891 2431921.847179043 1.85311739059653 116.547487776007 43.8138169881781 71.541215687779 2185300.40631191 T 24 CATAB v2.0f-lin.ifort 2020-Nov-13 01:54:33 2020-Nov-13 01:54
1956-Dec-14 12:13 00:02 Jupiter 1.76019120548175 1.76019069800139 1.76019171296251 1.53907752004649 1.18589147205139 2435822.008916589 1.51777277911323 113.461011676817 55.0234538894814 -53.0573376138449 2677122.86304474 T 24 CATAB v2.0f-lin.ifort 2020-Nov-13 01:54:33 2020-Nov-13 01:54
1967-Aug-05 08:38 00:01 Jupiter 1.93239382469983 1.93239320496812 1.93239444443143 2.53959938178405 2.36070091661461 2439707.859941390 1.16884844180505 57.8289006199732 10.9020106716028 86.4584327550952 1913730.48000279 T 24 CATAB v2.0f-lin.ifort 2020-Nov-13 01:54:33 2020-Nov-13 01:54
2042-Aug-15 03:36 < 00:01 Jupiter 1.92125736413477 1.92125698972644 1.9212577385431 2.81208477572603 2.65067596946604 2467111.650058637 0.754676631056329 47.2586164044631 12.5762172895656 -88.0333262531228 3271995.53911641 T 24 CATAB v2.0f-lin.ifort 2020-Nov-13 01:54:33 2020-Nov-13 01:54
2053-Apr-23 05:13 00:01 Jupiter 1.74208686197218 1.74208650032567 1.74208722361849 1.90333670041545 1.62796430179149 2471015.717104065 1.10253419604863 79.3481263370773 32.4757886016428 77.7982564417483 2392268.18482865 T 24 CATAB v2.0f-lin.ifort 2020-Nov-13 01:54:33 2020-Nov-13 01:54
2063-Dec-30 03:31 00:02 Jupiter 1.75046019384167 1.75045976121954 1.7504606264638 1.55871898899404 1.20906312782961 2474918.646445302 1.52242963674868 81.9893118196289 66.8968166527526 -83.0000943134412 2568184.34759544 T 24 CATAB v2.0f-lin.ifort 2020-Nov-13 01:54:33 2020-Nov-13 01:54
2074-Aug-22 09:45 00:02 Jupiter 1.92220022640577 1.92219957351544 1.92220087929654 2.34946068901126 2.15375493995001 2478806.905980719 1.93875322544611 84.8020670344794 10.8710199996056 -89.946812503763 2445603.04653808 T 24 CATAB v2.0f-lin.ifort 2020-Nov-13 01:54:33 2020-Nov-13 01:54
2149-Aug-31 07:19 00:04 Jupiter 1.93655132018166 1.9365499630766 1.93655267728837 2.92218259428014 2.76846111875938 2506208.804934132 3.75224963620847 123.959924221726 16.8737106786761 -71.8558419727676 2428390.16236411 T 24 CATAB v2.0f-lin.ifort 2020-Nov-13 01:54:33 2020-Nov-13 01:54
2160-May-09 18:33 00:04 Jupiter 1.74324418638018 1.74324344799996 1.74324492476833 2.02551252425015 1.76944164684054 2510113.272937759 4.01470852753871 243.057697856785 24.9523406998115 82.2011691582107 2439632.73727234 T 24 CATAB v2.0f-lin.ifort 2020-Nov-13 01:54:33 2020-Nov-13 01:54
2171-Jan-20 23:32 00:04 Jupiter 1.73383977452435 1.73383905215646 1.73384049689609 1.61467972548753 1.27677030644565 2514021.480873633 4.48711299265192 188.585500968905 64.7373143255044 69.674984677979 2404486.35343087 T 24 CATAB v2.0f-lin.ifort 2020-Nov-13 01:54:33 2020-Nov-13 01:54
2181-Sep-15 09:40 00:05 Jupiter 1.90580694056106 1.90580534726117 1.90580853386711 2.17615616346287 1.96131835456251 2517911.902581769 5.0501817255648 222.281326915411 13.570654793167 -85.2769039735423 2428414.96667214 T 24 CATAB v2.0f-lin.ifort 2020-Nov-13 01:54:33 2020-Nov-13 01:54

Alternate Designations
 1999 UU3 = 1982 SN8 = 1988 XA5 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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