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308086 (2004 UM8)
Classification: Main-belt Asteroid          SPK-ID: 2308086
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .253614174068939 5.9984e-08  
a 2.288447632372882 1.4472e-08 au
q 1.708064876188614 1.3809e-07 au
i 2.294837635021526 6.5842e-06 deg
node 280.2078903553959 0.00016317 deg
peri 104.8366281574294 0.00016407 deg
M 189.9962028158025 2.16e-05 deg
tp 2459597.626047305019
(2022-Jan-18.12604730)
8.0632e-05 TDB
period 1264.473974054203
3.46
1.1995e-05
3.284e-08
d
yr
n .2847033686630614 2.7006e-09 deg/d
Q 2.868830388557149 1.8142e-08 au
  Orbit Determination Parameters
   # obs. used (total)      155  
   data-arc span      8241 days (22.56 yr)  
   first obs. used      1997-10-03  
   last obs. used      2020-04-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .62288  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-21 20:10:28  

Additional Information
 Earth MOID = .713857 au 
 Jupiter MOID = 2.59515 au 
 T_jup = 3.556 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457155.5 (2015-May-13.0) TDB
Reference: JPL 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2522062636105455 5.9767e-08  
q 1.711883739509437 1.3747e-07 au
tp 2457066.505992241994
(2015-Feb-13.00599224)
6.2138e-05 TDB
node 280.454420034689 0.00016311 deg
peri 104.3666261819234 0.00016404 deg
i 2.294836548027507 6.5811e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      155  
   data-arc span      8241 days (22.56 yr)  
   first obs. used      1997-10-03  
   last obs. used      2020-04-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .62288  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-21 20:10:28  

Additional Information
 Jupiter MOID = 2.59515 au 
 T_jup = 3.556 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.57210152016217E-15 -8.19013673884958E-15 4.503325390738338E-13 -7.711621061950906E-14 1.162445599306594E-13 -1.198579026597409E-15
q -8.19013673884958E-15 1.889760082059275E-14 -5.331481001634015E-13 1.743394041044047E-13 -1.365436448630585E-13 2.692953708351178E-15
tp 4.503325390738338E-13 -5.331481001634015E-13 3.861134029073513E-9 -4.95181894668839E-11 1.120110817436602E-9 -2.401995440438928E-12
node -7.711621061950906E-14 1.743394041044047E-13 -4.95181894668839E-11 2.660420728306005E-8 -2.659448468099668E-8 -1.321347352660611E-10
peri 1.162445599306594E-13 -1.365436448630585E-13 1.120110817436602E-9 -2.659448468099668E-8 2.690820260631929E-8 1.313654020413187E-10
i -1.198579026597409E-15 2.692953708351178E-15 -2.401995440438928E-12 -1.321347352660611E-10 1.313654020413187E-10 4.331145762844809E-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 17.6   n/a MPO471231  

308086 (2004 UM8)          Discovered 2004-Oct-21 by LINEAR at Socorro
Reference: 20111210/Numbers.arcLast Updated: 2011-12-12

[ show close-approach data ]
Alternate Designations
 2004 UM8 = 1997 UJ21 = 2002 CQ281 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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