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175620 (2006 WE99)
Classification: Outer Main-belt Asteroid          SPK-ID: 2175620
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 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1241445633893457 7.7804e-08  
a 3.95811783923159 5.5837e-08 au
q 3.466739028236604 3.146e-07 au
i 7.475657389294089 6.0014e-06 deg
node 75.87647340263906 6.1204e-05 deg
peri 223.6856162788323 6.6409e-05 deg
M 36.2446662252133 2.4652e-05 deg
tp 2458910.916968420243
(2020-Mar-02.41696842)
0.00019809 TDB
period 2876.28228443147
7.87
6.0863e-05
1.666e-07
d
yr
n .1251615677461776 2.6485e-09 deg/d
Q 4.449496650226576 6.2769e-08 au
  Orbit Determination Parameters
   # obs. used (total)      305  
   data-arc span      8018 days (21.95 yr)  
   first obs. used      1998-12-15  
   last obs. used      2020-11-27  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52712  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 21:06:08  

Additional Information
 Earth MOID = 2.45456 au 
 Jupiter MOID = .787115 au 
 T_jup = 3.031 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457367.5 (2015-Dec-11.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1307669576995809 7.5029e-08  
q 3.432003114750466 3.0743e-07 au
tp 2456068.026349960314
(2012-May-20.52634996)
0.00021151 TDB
node 76.08596650274887 6.122e-05 deg
peri 227.6336116826574 6.5938e-05 deg
i 7.48662791081213 5.9818e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      305  
   data-arc span      8018 days (21.95 yr)  
   first obs. used      1998-12-15  
   last obs. used      2020-11-27  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52712  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 21:06:08  

Additional Information
 Jupiter MOID = .787115 au 
 T_jup = 3.031 
Orbit Covariance (6×6)
  e q tp node peri i
e 5.6292761625284E-15 -2.277210616743638E-14 5.491706980587835E-12 2.661001727605545E-15 5.280471999320337E-13 -6.915240774779732E-15
q -2.277210616743638E-14 9.451247726025547E-14 -2.748924401723104E-11 8.756141497938259E-15 -2.652544476327025E-12 3.182746926672443E-14
tp 5.491706980587835E-12 -2.748924401723104E-11 4.473674762000406E-8 -3.670967446064525E-11 5.30477929011844E-9 -1.423740802301385E-11
node 2.661001727605545E-15 8.756141497938259E-15 -3.670967446064525E-11 3.747892924404873E-9 -3.718989753515085E-9 1.029229879202504E-10
peri 5.280471999320337E-13 -2.652544476327025E-12 5.30477929011844E-9 -3.718989753515085E-9 4.347798364710121E-9 -1.034852012174024E-10
i -6.915240774779732E-15 3.182746926672443E-14 -1.423740802301385E-11 1.029229879202504E-10 -1.034852012174024E-10 3.578187121491256E-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 14.44   n/a E2021B55  
diameter diameter 8.046 km 0.550 urn:nasa:pds:neowise_diameters_albedos::2.0[hildas] (http://adsabs.harvard.edu/abs/2012ApJ...744..197G)  
geometric albedo albedo 0.047   0.013 urn:nasa:pds:neowise_diameters_albedos::2.0[hildas] (http://adsabs.harvard.edu/abs/2012ApJ...744..197G)  

175620 (2006 WE99)          Discovered 2006-Nov-19 by Spacewatch at Kitt Peak
Reference: 20080122/Numbers.arcLast Updated: 2008-01-28

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