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15255 (1990 QQ8)
Classification: Main-belt Asteroid          SPK-ID: 2015255
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 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .159871990598952 4.1131e-08  
a 3.15303837791406 1.8664e-08 au
q 2.648955856002048 1.3299e-07 au
i 2.158049785485819 4.0997e-06 deg
node 52.07586128426014 0.00012798 deg
peri 308.8303345849682 0.00012859 deg
M 92.4602019088849 1.3576e-05 deg
tp 2458475.275895915643
(2018-Dec-22.77589592)
7.6054e-05 TDB
period 2044.995290586738
5.60
1.8157e-05
4.971e-08
d
yr
n .1760395252043397 1.5631e-09 deg/d
Q 3.657120899826072 2.1648e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1172  
   data-arc span      11028 days (30.19 yr)  
   first obs. used      1990-08-16  
   last obs. used      2020-10-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52763  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 02:34:49  

Additional Information
 Earth MOID = 1.64668 au 
 Jupiter MOID = 1.79626 au 
 T_jup = 3.186 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456818.5 (2014-Jun-10.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1550300357430451 4.0403e-08  
q 2.666338815874065 1.2924e-07 au
tp 2456411.902887691645
(2013-Apr-29.40288769)
7.8973e-05 TDB
node 52.47083342565166 0.00012827 deg
peri 306.1361844947807 0.00012896 deg
i 2.157292892990947 4.0846e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1172  
   data-arc span      11028 days (30.19 yr)  
   first obs. used      1990-08-16  
   last obs. used      2020-10-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52763  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 02:34:49  

Additional Information
 Jupiter MOID = 1.79626 au 
 T_jup = 3.186 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.632417492374482E-15 -5.18329262566694E-15 -3.848651928637596E-13 3.878326391346669E-15 -8.320676673573947E-14 9.963211064719378E-17
q -5.18329262566694E-15 1.670200126697037E-14 1.235152398405732E-12 -1.214742325669002E-14 2.743815210233491E-13 -1.078527039115269E-16
tp -3.848651928637596E-13 1.235152398405732E-12 6.236717865197052E-9 8.774619921390694E-12 1.09106522129476E-9 8.46511377114921E-13
node 3.878326391346669E-15 -1.214742325669002E-14 8.774619921390694E-12 1.645251809293408E-8 -1.643901326709879E-8 -3.293266479119955E-11
peri -8.320676673573947E-14 2.743815210233491E-13 1.09106522129476E-9 -1.643901326709879E-8 1.662944376715014E-8 3.302013224367865E-11
i 9.963211064719378E-17 -1.078527039115269E-16 8.46511377114921E-13 -3.293266479119955E-11 3.302013224367865E-11 1.668409535888349E-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 14.1   n/a MPO452386  
diameter diameter 9.478 km 0.460 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.059   0.011 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

15255 (1990 QQ8)          Discovered 1990-Aug-16 by Elst, E. W. at La Silla
Reference: 20000621/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1990 QQ8 = 1996 UE4 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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