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JPL Small-Body Database Browser
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11045 (1990 HH1)
Classification: Main-belt Asteroid          SPK-ID: 2011045
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 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1739364422338519 3.0294e-08  
a 2.65608724600226 1.0683e-08 au
q 2.194096880169917 8.231e-08 au
i 12.7870250305747 3.7819e-06 deg
node 161.4947204117002 1.7011e-05 deg
peri 114.0961022831908 2.0895e-05 deg
M 303.8536413660057 1.2317e-05 deg
tp 2459247.093160110263
(2021-Feb-01.59316011)
5.4578e-05 TDB
period 1581.109439676932
4.33
9.5388e-06
2.612e-08
d
yr
n .2276882238294389 1.3736e-09 deg/d
Q 3.118077611834603 1.2541e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1715  
   data-arc span      10960 days (30.01 yr)  
   first obs. used      1990-04-26  
   last obs. used      2020-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .473  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 03:28:33  

Additional Information
 Earth MOID = 1.21385 au 
 Jupiter MOID = 2.16894 au 
 T_jup = 3.331 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456885.5 (2014-Aug-16.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1748774910433842 3.0475e-08  
q 2.192421198124079 8.2944e-08 au
tp 2457661.844842539844
(2016-Sep-30.34484254)
5.1436e-05 TDB
node 161.5633369022294 1.7047e-05 deg
peri 113.459410025145 2.0805e-05 deg
i 12.77034921157776 3.7762e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1715  
   data-arc span      10960 days (30.01 yr)  
   first obs. used      1990-04-26  
   last obs. used      2020-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .473  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 03:28:33  

Additional Information
 Jupiter MOID = 2.16894 au 
 T_jup = 3.331 
Orbit Covariance (6×6)
  e q tp node peri i
e 9.286962617223845E-16 -2.513638840877757E-15 -3.632416885666822E-13 -1.496256328139054E-15 -5.330565747407001E-14 -3.48013624793345E-15
q -2.513638840877757E-15 6.879667927000184E-15 1.064629406456611E-12 4.281230718029502E-15 1.54504859713088E-13 9.723746214743052E-15
tp -3.632416885666822E-13 1.064629406456611E-12 2.645702260499479E-9 2.813825146980753E-13 6.244317916707076E-10 5.84710857501696E-12
node -1.496256328139054E-15 4.281230718029502E-15 2.813825146980753E-13 2.90615678977863E-10 -2.83379999514744E-10 1.897662495648631E-11
peri -5.330565747407001E-14 1.54504859713088E-13 6.244317916707076E-10 -2.83379999514744E-10 4.328588845238099E-10 -1.73147309030228E-11
i -3.48013624793345E-15 9.723746214743052E-15 5.84710857501696E-12 1.897662495648631E-11 -1.73147309030228E-11 1.425979564131234E-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 13.7   n/a MPO279632  
diameter diameter 4.932 km 0.235 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 3.973296 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 sidereal period (not synodic); Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Durech, J.; Hanus, J.; Ali-Lagoa, V. (2018) Astron. Astrophys. 617, A57.]
geometric albedo albedo 0.289   0.070 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

11045 (1990 HH1)          Discovered 1990-Apr-26 by Helin, E. F. at Palomar
Reference: 19990728/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1990 HH1 = 1995 SM2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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