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18511 (1996 SH4)
Classification: Main-belt Asteroid          SPK-ID: 2018511
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04349479303757982 4.634e-08  
a 2.631535496299532 2.0451e-08 au
q 2.517077404516939 1.2901e-07 au
i 28.79379117463683 7.599e-06 deg
node 39.13580984091167 1.1208e-05 deg
peri 72.32968084537498 0.00013121 deg
M 184.3262609707558 0.00012487 deg
tp 2459961.380790316211
(2023-Jan-16.88079032)
0.0005374 TDB
period 1559.237516247304
4.27
1.8177e-05
4.977e-08
d
yr
n .2308820793809722 2.6915e-09 deg/d
Q 2.745993588082125 2.1341e-08 au
  Orbit Determination Parameters
   # obs. used (total)      851  
   data-arc span      8648 days (23.68 yr)  
   first obs. used      1996-09-19  
   last obs. used      2020-05-24  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .5453  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:30:36  

Additional Information
 Earth MOID = 1.58905 au 
 Jupiter MOID = 2.36311 au 
 T_jup = 3.223 
[ 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 14.76   n/a E2021B10  
diameter diameter 6.170 km 0.119 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.081   0.009 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18511 (1996 SH4)          Discovered 1996-Sep-19 by Beijing Schmidt CCD Asteroid Program at Xinglong
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1996 SH4 = 1998 GR5 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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