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8508 (1991 CU1)
Classification: Main-belt Asteroid          SPK-ID: 2008508
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .132638958475077 3.1799e-08  
a 2.286467539389959 6.5132e-09 au
q 1.983192866378203 7.2303e-08 au
i 3.874487180261155 2.7431e-06 deg
node 276.4942705926747 5.9552e-05 deg
peri 228.8713135559641 6.1274e-05 deg
M 173.4039955273306 1.568e-05 deg
tp 2458392.221331691594
(2018-Sep-30.72133169)
5.3816e-05 TDB
period 1262.833188618841
3.46
5.3959e-06
1.477e-08
d
yr
n .2850732806553267 1.2181e-09 deg/d
Q 2.589742212401716 7.3771e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2403  
   data-arc span      23748 days (65.02 yr)  
   first obs. used      1955-10-25  
   last obs. used      2020-10-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4172  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 03:20:21  

Additional Information
 Earth MOID = .997965 au 
 Jupiter MOID = 2.43051 au 
 T_jup = 3.587 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457215.5 (2015-Jul-12.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .132421792553338 3.166e-08  
q 1.98368303828691 7.1937e-08 au
tp 2457128.108893117108
(2015-Apr-15.60889312)
5.1872e-05 TDB
node 276.5322419804281 5.9562e-05 deg
peri 228.5440903941623 6.1308e-05 deg
i 3.873964351857852 2.7429e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2403  
   data-arc span      23748 days (65.02 yr)  
   first obs. used      1955-10-25  
   last obs. used      2020-10-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4172  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 03:20:21  

Additional Information
 Jupiter MOID = 2.43051 au 
 T_jup = 3.587 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.002378048869204E-15 -2.270622888421868E-15 6.709077350775429E-13 -1.480225635179068E-14 2.052197321492579E-13 2.71474977795154E-16
q -2.270622888421868E-15 5.174864105884166E-15 -1.424210210664672E-12 3.313179395358715E-14 -4.387163966681682E-13 -5.84146412217407E-16
tp 6.709077350775429E-13 -1.424210210664672E-12 2.69072376113821E-9 -2.518634471410454E-11 7.737530265185842E-10 -1.383723562024556E-13
node -1.480225635179068E-14 3.313179395358715E-14 -2.518634471410454E-11 3.547581109050217E-9 -3.546190343491256E-9 3.243407576921292E-12
peri 2.052197321492579E-13 -4.387163966681682E-13 7.737530265185842E-10 -3.546190343491256E-9 3.758610388537581E-9 -3.263000962950144E-12
i 2.71474977795154E-16 -5.84146412217407E-16 -1.383723562024556E-13 3.243407576921292E-12 -3.263000962950144E-12 7.523311529662492E-12

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.7   n/a MPO337328  
diameter diameter 4.834 km 0.167 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.208   0.028 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

8508 (1991 CU1)          Discovered 1991-Feb-14 by Ueda, S., Kaneda, H. at Kushiro
Reference: 19980313/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1991 CU1 = 1967 GD = 1981 JN2 = 1986 VT5 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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