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JPL Small-Body Database Browser
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40018 (1998 HH134)
Classification: Main-belt Asteroid          SPK-ID: 2040018
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08206395053431209 3.0435e-08  
a 2.384648751621261 9.6538e-09 au
q 2.188955054426505 7.3047e-08 au
i 6.038884734084552 4.1122e-06 deg
node 125.296704294307 3.4788e-05 deg
peri 318.1233271814576 4.5019e-05 deg
M 105.3758220230549 2.7222e-05 deg
tp 2458606.792643971768
(2019-May-03.29264397)
0.00010176 TDB
period 1345.039549386895
3.68
8.1677e-06
2.236e-08
d
yr
n .2676501223804889 1.6253e-09 deg/d
Q 2.580342448816018 1.0446e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1341  
   data-arc span      8092 days (22.15 yr)  
   first obs. used      1997-12-08  
   last obs. used      2020-02-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5521  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 05:41:53  

Additional Information
 Earth MOID = 1.20938 au 
 Jupiter MOID = 2.56381 au 
 T_jup = 3.524 
[ 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 14.8   n/a MPO263680  
diameter diameter 2.693 km 0.244 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.154   0.042 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

40018 (1998 HH134)          Discovered 1998-Apr-19 by LINEAR at Socorro
Reference: 20020526/Numbers.arcLast Updated: 2004-04-19

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
2171-Apr-11 16:30 < 00:01 Pallas 0.0325710975321524 0.0325563521574782 0.0325858660956592 10.9777723116592 10.9777720443191 2514102.187186887 0.870898808492028 1555.77745815144 29.257943234059 61.8036545874079 146708.69608921 T 26 CATAB v2.0f-lin.ifort 2020-Feb-23 05:42:06 2020-Feb-23 05:42

Alternate Designations
 1998 HH134 = 1999 NK33 = 2000 WY48 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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