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295557 (2008 SQ54)
Classification: Main-belt Asteroid          SPK-ID: 2295557
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 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1865570315368376 5.7075e-08  
a 3.056579539865893 4.2643e-08 au
q 2.486353134252279 1.6653e-07 au
i .5604586096427416 6.9635e-06 deg
node 191.2544611998006 0.00054602 deg
peri 119.2700448343196 0.00054631 deg
M 112.5801273912507 2.256e-05 deg
tp 2458390.104652928703
(2018-Sep-28.60465293)
0.00011407 TDB
period 1951.874900460846
5.34
4.0846e-05
1.118e-07
d
yr
n .1844380497515504 3.8597e-09 deg/d
Q 3.626805945479507 5.0598e-08 au
  Orbit Determination Parameters
   # obs. used (total)      238  
   data-arc span      6810 days (18.64 yr)  
   first obs. used      2001-03-28  
   last obs. used      2019-11-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55777  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 18:31:02  

Additional Information
 Earth MOID = 1.47201 au 
 Jupiter MOID = 1.65134 au 
 T_jup = 3.208 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457128.5 (2015-Apr-16.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1909957790672944 5.7741e-08  
q 2.468488380121611 1.6913e-07 au
tp 2456438.415672495559
(2013-May-25.91567250)
9.2084e-05 TDB
node 191.5123949527012 0.00055465 deg
peri 118.7512100892091 0.00055493 deg
i .5527627518401398 6.9676e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      238  
   data-arc span      6810 days (18.64 yr)  
   first obs. used      2001-03-28  
   last obs. used      2019-11-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55777  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 18:31:02  

Additional Information
 Jupiter MOID = 1.65134 au 
 T_jup = 3.208 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.334008478292992E-15 -9.586967994194672E-15 2.168417974089381E-12 -3.46137974047855E-14 4.383337751414113E-13 -5.811464444597801E-17
q -9.586967994194672E-15 2.860480890223895E-14 -5.697180527256451E-12 1.313381091586081E-13 -1.122935356693665E-12 3.111704372693203E-16
tp 2.168417974089381E-12 -5.697180527256451E-12 8.479507454191049E-9 -1.224001581973665E-12 1.628376052063358E-9 -2.090036088789068E-13
node -3.46137974047855E-14 1.313381091586081E-13 -1.224001581973665E-12 3.076373482345684E-7 -3.076229427747174E-7 -5.503966494449212E-10
peri 4.383337751414113E-13 -1.122935356693665E-12 1.628376052063358E-9 -3.076229427747174E-7 3.079433257949977E-7 5.503279777145146E-10
i -5.811464444597801E-17 3.111704372693203E-16 -2.090036088789068E-13 -5.503966494449212E-10 5.503279777145146E-10 4.854759972159284E-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 15.8   n/a MPO455185  

295557 (2008 SQ54)          Discovered 2008-Sep-20 by Mt. Lemmon Survey at Mount Lemmon
Reference: 20110912/Numbers.arcLast Updated: 2011-09-14

[ show close-approach data ]
Alternate Designations
 2008 SQ54 = 2003 UW28 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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