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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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1331447171683703 1.2765e-08  
a 2.285659005629176 6.0128e-09 au
q 1.981335583781341 2.9424e-08 au
i 3.874271484114547 9.4416e-07 deg
node 276.4874896815571 2.3918e-06 deg
peri 228.893493157001 5.7034e-06 deg
M 286.3430860721607 6.0644e-06 deg
tp 2459654.741837708620
(2022-Mar-16.24183771)
2.1907e-05 TDB
period 1262.163408939205
3.46
4.9805e-06
1.364e-08
d
yr
n .285224557652614 1.1255e-09 deg/d
Q 2.589982427477011 6.8134e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2576  
   data-arc span      24019 days (65.76 yr)  
   first obs. used      1955-10-25  
   last obs. used      2021-07-29  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .41493  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 23:26:19  

Additional Information
 Earth MOID = .996809 au 
 Jupiter MOID = 2.42902 au 
 T_jup = 3.587 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457298.5 (2015-Oct-03.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1323384620351049 1.2743e-08  
q 1.983581461898068 2.9375e-08 au
tp 2457127.980862187929
(2015-Apr-15.48086219)
1.7391e-05 TDB
node 276.5256075062993 2.391e-06 deg
peri 228.503619417221 5.7381e-06 deg
i 3.873998465462081 9.4415e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      2576  
   data-arc span      24019 days (65.76 yr)  
   first obs. used      1955-10-25  
   last obs. used      2021-07-29  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .41493  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 23:26:19  

Additional Information
 Jupiter MOID = 2.42902 au 
 T_jup = 3.587 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.623790720516047E-16 -3.683147853843764E-16 -1.446903151811194E-13 -1.129372987728795E-14 -3.130425782162988E-14 -2.994847339790879E-15
q -3.683147853843764E-16 8.629111422361725E-16 3.524038290301586E-13 2.612586279881886E-14 7.845871486611585E-14 7.047643267620911E-15
tp -1.446903151811194E-13 3.524038290301586E-13 3.024344011496224E-10 4.326917416333568E-12 9.183197195477187E-11 3.996706343577819E-12
node -1.129372987728795E-14 2.612586279881886E-14 4.326917416333568E-12 5.716886533272279E-12 -3.784261701682088E-12 -4.457314366889253E-14
peri -3.130425782162988E-14 7.845871486611585E-14 9.183197195477187E-11 -3.784261701682088E-12 3.292631559634664E-11 1.163253991450872E-12
i -2.994847339790879E-15 7.047643267620911E-15 3.996706343577819E-12 -4.457314366889253E-14 1.163253991450872E-12 8.914131137403912E-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 13.82   n/a E2021B10  
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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