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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 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .173936444235163 2.9874e-08  
a 2.656087246702737 1.0506e-08 au
q 2.194096875432899 8.1465e-08 au
i 12.7870251584535 3.7642e-06 deg
node 161.494719223318 1.6716e-05 deg
peri 114.0961030865938 2.0678e-05 deg
M 303.8536413856149 1.2314e-05 deg
tp 2459247.093160121689
(2021-Feb-01.59316012)
5.4565e-05 TDB
period 1581.1094403024
4.33
9.3812e-06
2.568e-08
d
yr
n .2276882237393682 1.3509e-09 deg/d
Q 3.118077617972575 1.2334e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1825  
   data-arc span      11009 days (30.14 yr)  
   first obs. used      1990-04-26  
   last obs. used      2020-06-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46476  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 17:11:04  

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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