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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 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1739364300793847 3.2731e-08  
a 2.656087241393585 1.1694e-08 au
q 2.194096908646184 8.7267e-08 au
i 12.78702513487733 3.8082e-06 deg
node 161.4947206255582 1.865e-05 deg
peri 114.0961044351893 2.2236e-05 deg
M 303.8536411529948 1.2322e-05 deg
tp 2459247.093160403992
(2021-Feb-01.59316040)
5.4596e-05 TDB
period 1581.10943556177
4.33
1.0442e-05
2.859e-08
d
yr
n .2276882244220443 1.5037e-09 deg/d
Q 3.118077574140986 1.3728e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1559  
   data-arc span      10875 days (29.77 yr)  
   first obs. used      1990-04-26  
   last obs. used      2020-02-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49303  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 19:55:27  

Additional Information
 Earth MOID = 1.21385 au 
 Jupiter MOID = 2.16894 au 
 T_jup = 3.331 
[ show covariance matrix ]

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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