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226682 (2004 HP43)
Classification: Main-belt Asteroid          SPK-ID: 2226682
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 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .149448821450701 4.819e-08  
a 2.293018430827457 1.2968e-08 au
q 1.950329528775558 1.0714e-07 au
i .1921806478451586 5.2007e-06 deg
node 243.4239197339541 0.001501 deg
peri 302.1547085642775 0.0015011 deg
M 249.8505757732116 1.8893e-05 deg
tp 2459388.551597572434
(2021-Jun-23.05159757)
6.7791e-05 TDB
period 1268.264233850634
3.47
1.0759e-05
2.946e-08
d
yr
n .283852520942728 2.408e-09 deg/d
Q 2.635707332879357 1.4907e-08 au
  Orbit Determination Parameters
   # obs. used (total)      279  
   data-arc span      7229 days (19.79 yr)  
   first obs. used      2000-01-08  
   last obs. used      2019-10-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56885  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 02:31:20  

Additional Information
 Earth MOID = .951914 au 
 Jupiter MOID = 2.32203 au 
 T_jup = 3.582 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457033.5 (2015-Jan-11.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1491507587335086 4.8269e-08  
q 1.950923429945468 1.0729e-07 au
tp 2456852.200483479489
(2014-Jul-13.70048348)
6.261e-05 TDB
node 243.5909095126476 0.0015076 deg
peri 302.0516736384549 0.0015077 deg
i .1913357525651095 5.2006e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      279  
   data-arc span      7229 days (19.79 yr)  
   first obs. used      2000-01-08  
   last obs. used      2019-10-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56885  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 02:31:20  

Additional Information
 Jupiter MOID = 2.32203 au 
 T_jup = 3.582 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.329873898459607E-15 -5.154385392985243E-15 2.727598532426862E-13 1.386855541031377E-14 1.737441243805625E-14 9.34584778178618E-17
q -5.154385392985243E-15 1.151053059208695E-14 -5.726050483247676E-13 -3.288218579670639E-14 -2.393503840505684E-14 -1.918576972653042E-16
tp 2.727598532426862E-13 -5.726050483247676E-13 3.92004242810964E-9 -1.652769718036724E-12 1.113232960869914E-9 -3.93535919897287E-14
node 1.386855541031377E-14 -3.288218579670639E-14 -1.652769718036724E-12 2.272848711034165E-6 -2.272837222127152E-6 4.89618334576336E-10
peri 1.737441243805625E-14 -2.393503840505684E-14 1.113232960869914E-9 -2.272837222127152E-6 2.273155564089504E-6 -4.896287470193367E-10
i 9.34584778178618E-17 -1.918576972653042E-16 -3.93535919897287E-14 4.89618334576336E-10 -4.896287470193367E-10 2.704613223624062E-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 17.4   n/a MPO450051  
rotation period rot_per 4.47 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Chang, C.K.; Ip, W.-H.; Lin, H.-W.; Cheng, Y.C.; et al. (2015) Astrophys. J. Supp. Ser. 219, A27.]

226682 (2004 HP43)          Discovered 2004-Apr-21 by Spacewatch at Kitt Peak
Reference: 20091202/Numbers.arcLast Updated: 2009-12-04
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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