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441445 (2008 HY54)
Classification: Main-belt Asteroid          SPK-ID: 2441445
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 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1834354590184599 7.5139e-08  
a 2.20227666741859 2.9016e-08 au
q 1.798301036045016 1.7304e-07 au
i 4.085480860933085 8.2332e-06 deg
node 97.13185477127907 0.00011246 deg
peri 80.97858930219824 0.00011818 deg
M 288.3528024984319 5.2999e-05 deg
tp 2459238.076210075375
(2021-Jan-23.57621008)
0.00017987 TDB
period 1193.730370615865
3.27
2.3592e-05
6.459e-08
d
yr
n .3015756395761883 5.9601e-09 deg/d
Q 2.606252298792163 3.4339e-08 au
  Orbit Determination Parameters
   # obs. used (total)      67  
   data-arc span      6855 days (18.77 yr)  
   first obs. used      2001-01-21  
   last obs. used      2019-10-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56281  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-08 15:56:48  

Additional Information
 Earth MOID = .807692 au 
 Jupiter MOID = 2.36018 au 
 T_jup = 3.639 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457228.5 (2015-Jul-25.0) TDB
Reference: JPL 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1833928145967003 7.5218e-08  
q 1.798494173983049 1.7314e-07 au
tp 2456850.973922820900
(2014-Jul-12.47392282)
0.00013991 TDB
node 97.15332557835869 0.00011251 deg
peri 81.04124596431724 0.00011821 deg
i 4.084762358795917 8.2309e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      67  
   data-arc span      6855 days (18.77 yr)  
   first obs. used      2001-01-21  
   last obs. used      2019-10-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56281  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-08 15:56:48  

Additional Information
 Jupiter MOID = 2.36018 au 
 T_jup = 3.639 
Orbit Covariance (6×6)
  e q tp node peri i
e 5.657747271060245E-15 -1.290859576125207E-14 -2.664681011200144E-12 -4.297648965817364E-14 -7.684087003271681E-13 2.753685243050243E-15
q -1.290859576125207E-14 2.997894329650862E-14 8.510007300256117E-12 1.285690751298973E-13 2.379128682686651E-12 -4.807802609844365E-15
tp -2.664681011200144E-12 8.510007300256117E-12 1.957460494130311E-8 2.141033366768231E-10 5.140823633185171E-9 3.980228875544529E-12
node -4.297648965817364E-14 1.285690751298973E-13 2.141033366768231E-10 1.265857238360607E-8 -1.256728884187391E-8 1.732024132035245E-10
peri -7.684087003271681E-13 2.379128682686651E-12 5.140823633185171E-9 -1.256728884187391E-8 1.397465347057367E-8 -1.717237258601102E-10
i 2.753685243050243E-15 -4.807802609844365E-15 3.980228875544529E-12 1.732024132035245E-10 -1.717237258601102E-10 6.774833936806093E-11

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 18.2   n/a MPO495186  

441445 (2008 HY54)          Discovered 2008-Apr-29 by Spacewatch at Kitt Peak
Reference: Last Updated: 2015-09-02
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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