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16468 (1990 HW1)
Classification: Main-belt Asteroid          SPK-ID: 2016468
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 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .058221419719845 3.1478e-08  
a 2.558849812141088 1.0902e-08 au
q 2.409869943228375 8.5395e-08 au
i 15.29504011107433 4.0099e-06 deg
node 135.497736424813 1.1926e-05 deg
peri 307.1512028547094 4.439e-05 deg
M 231.2361538738168 4.4945e-05 deg
tp 2459535.257717681503
(2021-Nov-16.75771768)
0.00018832 TDB
period 1495.084095085871
4.09
9.5549e-06
2.616e-08
d
yr
n .2407891309815073 1.5389e-09 deg/d
Q 2.7078296810538 1.1537e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2089  
   data-arc span      11161 days (30.56 yr)  
   first obs. used      1990-04-27  
   last obs. used      2020-11-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47187  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 03:02:44  

Additional Information
 Earth MOID = 1.45153 au 
 Jupiter MOID = 2.41073 au 
 T_jup = 3.384 
[ 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 MPO384896  
diameter diameter 4.995 km 0.087 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 94.13 h n/a LCDB (Rev. 2020-October); 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:
[Hanus, J.; Durech, J.; Oszkiewicz, D.A.; Behrend, R.; et al. (2016) Astron. Astrophys. 586, A108.]
geometric albedo albedo 0.282   0.044 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

16468 (1990 HW1)          Discovered 1990-Apr-27 by McNaught, R. H. at Siding Spring
Reference: 20000913/Numbers.arcLast Updated: 2004-04-19
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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