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30809 (1990 EO8)
Classification: Main-belt Asteroid          SPK-ID: 2030809
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 40 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08125849327532074 1.687e-08  
a 2.717066319905088 9.8117e-09 au
q 2.49628160462048 4.7456e-08 au
i 9.818480953865446 3.6912e-07 deg
node 349.2059460949351 4.4555e-06 deg
peri 179.6904492848352 1.2365e-05 deg
M 356.4227804405291 1.1848e-05 deg
tp 2459412.755183685868
(2021-Jul-17.25518369)
5.3837e-05 TDB
period 1635.869990540375
4.48
8.8611e-06
2.426e-08
d
yr
n .2200663879658808 1.192e-09 deg/d
Q 2.937851035189696 1.0609e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2610  
   data-arc span      11903 days (32.59 yr)  
   first obs. used      1988-11-05  
   last obs. used      2021-06-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .42507  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 06:45:57  

Additional Information
 Earth MOID = 1.50335 au 
 Jupiter MOID = 2.03296 au 
 T_jup = 3.334 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457405.5 (2016-Jan-18.0) TDB
Reference: JPL 40 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08107860866788338 1.6819e-08  
q 2.495790834269068 4.7297e-08 au
tp 2457782.621213700853
(2017-Jan-29.12121370)
5.5144e-05 TDB
node 349.2670524279179 4.4517e-06 deg
peri 180.8698506189209 1.2431e-05 deg
i 9.825930597777814 3.6938e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      2610  
   data-arc span      11903 days (32.59 yr)  
   first obs. used      1988-11-05  
   last obs. used      2021-06-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .42507  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 06:45:57  

Additional Information
 Jupiter MOID = 2.03296 au 
 T_jup = 3.334 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.828832975195357E-16 -7.81080146867438E-16 -5.270225814642126E-13 -2.306597998581266E-14 -6.643572276244652E-14 -4.896660583882932E-16
q -7.81080146867438E-16 2.237050098432428E-15 1.351104333890866E-12 6.247974095209321E-14 1.576304025189371E-13 1.366106997096721E-15
tp -5.270225814642126E-13 1.351104333890866E-12 3.040868581760669E-9 -2.161944024780732E-11 6.27441255589128E-10 -1.144341822082878E-12
node -2.306597998581266E-14 6.247974095209321E-14 -2.161944024780732E-11 1.981806046963424E-11 -2.579298234649179E-11 4.979901390026566E-13
peri -6.643572276244652E-14 1.576304025189371E-13 6.27441255589128E-10 -2.579298234649179E-11 1.545266317524663E-10 -7.675287636972742E-13
i -4.896660583882932E-16 1.366106997096721E-15 -1.144341822082878E-12 4.979901390026566E-13 -7.675287636972742E-13 1.364389720461266E-13

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.35   n/a MPO614063  
diameter diameter 9.223 km 0.162 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.119   0.018 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

30809 (1990 EO8)          Discovered 1990-Mar-07 by Debehogne, H. at La Silla
Reference: 20011130/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1990 EO8 = 1988 VT8 = 1999 GC22 = 2001 QP240 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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