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18002 (1999 JJ84)
Classification: Main-belt Asteroid          SPK-ID: 2018002
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06849219254860389 3.9032e-08  
a 2.62706814160946 1.2948e-08 au
q 2.447134484616041 1.0132e-07 au
i 16.16658285145293 4.0146e-06 deg
node 124.1069654268983 1.7856e-05 deg
peri 3.318159088301679 4.5687e-05 deg
M 127.8966816410303 4.0506e-05 deg
tp 2458647.961926208022
(2019-Jun-13.46192621)
0.00017501 TDB
period 1555.268706059212
4.26
1.1498e-05
3.148e-08
d
yr
n .2314712554798194 1.7113e-09 deg/d
Q 2.807001798602878 1.3835e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1619  
   data-arc span      11023 days (30.18 yr)  
   first obs. used      1990-05-26  
   last obs. used      2020-07-30  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46875  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:19:44  

Additional Information
 Earth MOID = 1.46252 au 
 Jupiter MOID = 2.25488 au 
 T_jup = 3.342 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457255.5 (2015-Aug-21.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06971518638406214 3.8848e-08  
q 2.444543792429851 1.0109e-07 au
tp 2457095.019728290055
(2015-Mar-13.51972829)
0.00017282 TDB
node 124.1346136114623 1.7853e-05 deg
peri 3.807987525532455 4.5061e-05 deg
i 16.16773867616901 4.0148e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1619  
   data-arc span      11023 days (30.18 yr)  
   first obs. used      1990-05-26  
   last obs. used      2020-07-30  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46875  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:19:44  

Additional Information
 Jupiter MOID = 2.25488 au 
 T_jup = 3.342 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.509176208359175E-15 -3.899300607216974E-15 -2.646617655494403E-12 -8.307940153285965E-15 -6.708703464029113E-13 2.227621056910625E-15
q -3.899300607216974E-15 1.021987550099625E-14 6.759398326958442E-12 2.138436010241182E-14 1.717627719483116E-12 -5.342362001033663E-15
tp -2.646617655494403E-12 6.759398326958442E-12 2.986797061628028E-8 3.17158927915121E-11 7.181680522553084E-9 -3.444333529479627E-11
node -8.307940153285965E-15 2.138436010241182E-14 3.17158927915121E-11 3.187224624033346E-10 -2.979232660116854E-10 -1.88892815041533E-11
peri -6.708703464029113E-13 1.717627719483116E-12 7.181680522553084E-9 -2.979232660116854E-10 2.030525419771689E-9 9.883497678689508E-12
i 2.227621056910625E-15 -5.342362001033663E-15 -3.444333529479627E-11 -1.88892815041533E-11 9.883497678689508E-12 1.61190103212578E-11

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 14.02   n/a E2021B10  
diameter diameter 5.141 km 0.294 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.106   0.018 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18002 (1999 JJ84)          Discovered 1999-May-12 by LINEAR at Socorro
Reference: 20001013/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 JJ84 = 1990 KA2 = 1998 BL2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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