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118219 (1996 HT20)
Classification: Main-belt Asteroid          SPK-ID: 2118219
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08679060144172156 3.7648e-08  
a 2.409833315486206 8.0612e-09 au
q 2.20068243266086 9.3471e-08 au
i 1.18656297998345 3.3632e-06 deg
node 135.1390890915434 0.00020426 deg
peri 357.5266295191503 0.00020613 deg
M 290.4233179238926 2.6128e-05 deg
tp 2459464.582818732985
(2021-Sep-07.08281873)
9.9143e-05 TDB
period 1366.403397044444
3.74
6.8562e-06
1.877e-08
d
yr
n .2634653871460556 1.322e-09 deg/d
Q 2.618984198311551 8.7609e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1018  
   data-arc span      9041 days (24.75 yr)  
   first obs. used      1996-04-18  
   last obs. used      2021-01-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5635  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 09:19:10  

Additional Information
 Earth MOID = 1.2149 au 
 Jupiter MOID = 2.39821 au 
 T_jup = 3.515 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.8   n/a MPO251130  
diameter diameter 4.365 km 0.126 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 4.82 h n/a LCDB (Rev. 2020-October); 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.]
geometric albedo albedo 0.049   0.005 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

118219 (1996 HT20)          Discovered 1996-Apr-18 by Elst, E. W. at La Silla
Reference: 20051116/Numbers.arcLast Updated: 2005-11-21

[ show close-approach data ]
Alternate Designations
 1996 HT20 = 2001 SN25 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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