Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP

Significant website upgrade scheduled for September 27. More details available here.

JPL Small-Body Database Browser
Search: [ help ]  
21842 (1999 TH102)
Classification: Main-belt Asteroid          SPK-ID: 2021842
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 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1936941135261768 1.9007e-08  
a 3.095952460324667 1.3596e-08 au
q 2.496284693002894 6.0836e-08 au
i 16.41197406209756 5.6651e-07 deg
node 125.2974665452327 1.7062e-06 deg
peri 115.7568078241042 4.1704e-06 deg
M 126.6768435933756 4.2735e-06 deg
tp 2458696.360492790931
(2019-Jul-31.86049279)
2.0263e-05 TDB
period 1989.71031678315
5.45
1.3107e-05
3.589e-08
d
yr
n .1809308606199657 1.1919e-09 deg/d
Q 3.695620227646439 1.623e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2420  
   data-arc span      12429 days (34.03 yr)  
   first obs. used      1987-07-29  
   last obs. used      2021-08-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .40472  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-24 22:46:01  

Additional Information
 Earth MOID = 1.53306 au 
 Jupiter MOID = 1.67503 au 
 T_jup = 3.133 
[ 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 12.37   n/a MPCxxxxx  
diameter diameter 10.114 km 0.083 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 9.458 h n/a LCDB (Rev. 2020-October); 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 0.144   0.030 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21842 (1999 TH102)          Discovered 1999-Oct-02 by LINEAR at Socorro
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

[ 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
1919-Mar-22 12:01 00:02 Jupiter 1.86397878632276 1.86397757768458 1.86397999497461 4.21565532465673 4.10644822642307 2422040.000625635 1.96868971376907 262.106843635994 3.87352158516659 -78.0311244870385 17543190.7449568 T 36 CATAB v2.0g-lin.ifort 2021-Aug-24 22:47:18 2021-Aug-24 22:47
1928-Dec-01 21:37 00:03 Jupiter 1.73870037099551 1.73870003498603 1.73870070702047 0.588262831853967 n/a 2425582.400671799 3.00287077331056 283.733879719395 6.81387244075298 86.906426490815 38106869.4498179 F 36 CATAB v2.0g-lin.ifort 2021-Aug-24 22:47:18 2021-Aug-24 22:47
1990-Mar-26 22:57 < 00:01 Jupiter 1.79457137691973 1.79457102974407 1.79457172409661 4.02250232629075 3.90340132209582 2447977.456166188 0.563911951186054 78.6965700342278 3.81953915048074 -79.0801167080831 17328413.3020792 T 36 CATAB v2.0g-lin.ifort 2021-Aug-24 22:47:18 2021-Aug-24 22:47
1999-Nov-11 21:18 < 00:01 Jupiter 1.76352300552642 1.76352284889506 1.76352316230042 1.0433586043589 0.357763109246262 2451494.387760455 0.553245141809272 6242.46339605354 146.06733508528 -22.635548996616 17837841.4684423 T 36 CATAB v2.0g-lin.ifort 2021-Aug-24 22:47:18 2021-Aug-24 22:47
2061-Mar-29 12:24 < 00:01 Jupiter 1.73773029072134 1.73772994339919 1.73773063804627 3.84965334664926 3.72088298095047 2473913.016957987 0.899923998377335 116.442386943512 3.95651600680612 -83.3205547345483 17412804.8488897 T 36 CATAB v2.0g-lin.ifort 2021-Aug-24 22:47:18 2021-Aug-24 22:47
2070-Oct-23 16:16 00:02 Jupiter 1.7953727876493 1.79537246587413 1.79537310942315 1.59000924072586 1.2587961205053 2477408.177947480 1.66993763727224 378.542897069139 14.334588828958 -6.12492751848591 1284266.11965664 T 36 CATAB v2.0g-lin.ifort 2021-Aug-24 22:47:18 2021-Aug-24 22:47
2132-Apr-03 23:09 00:02 Jupiter 1.69178945780228 1.69178874670165 1.691790168923 3.70392247349344 3.56618962589326 2499850.464497026 2.34321190617337 301.712612504963 4.41996099486162 -85.1153629920399 17420351.3732901 T 36 CATAB v2.0g-lin.ifort 2021-Aug-24 22:47:18 2021-Aug-24 22:47
2141-Oct-12 05:27 00:04 Jupiter 1.83520514047959 1.83520438823344 1.83520589272584 2.11533111757426 1.88455396129288 2503328.727157135 3.5363126029996 246.90372425846 13.18020396253 31.9227132289413 2657458.20517282 T 36 CATAB v2.0g-lin.ifort 2021-Aug-24 22:47:18 2021-Aug-24 22:47

Alternate Designations
 1999 TH102 = 1987 OQ1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Sep-23 12:58 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin