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146634 (2001 US42)
Classification: Main-belt Asteroid          SPK-ID: 2146634
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 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05884136418879896 3.9372e-08  
a 2.666491250291869 2.0459e-08 au
q 2.509591267527199 1.0496e-07 au
i 1.409105921834376 5.0809e-06 deg
node 186.3546097353961 0.00018018 deg
peri 255.4496578597708 0.00018748 deg
M 50.537190547972 4.9809e-05 deg
tp 2458777.236738081197
(2019-Oct-20.73673808)
0.00021959 TDB
period 1590.408438206984
4.35
1.8304e-05
5.011e-08
d
yr
n .2263569479082125 2.6052e-09 deg/d
Q 2.823391233056539 2.1663e-08 au
  Orbit Determination Parameters
   # obs. used (total)      441  
   data-arc span      6710 days (18.37 yr)  
   first obs. used      2001-09-19  
   last obs. used      2020-02-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57342  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-24 08:38:30  

Additional Information
 Earth MOID = 1.52585 au 
 Jupiter MOID = 2.30109 au 
 T_jup = 3.380 
[ 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 16.2   n/a MPO417788  

146634 (2001 US42)          Discovered 2001-Oct-17 by LINEAR at Socorro
Reference: 20070106/Numbers.arcLast Updated: 2007-01-09

[ 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
1964-Apr-12 14:21 00:01 Amphi 0.0459819654402467 0.0459781348089592 0.0459858009022749 2.36189540374499 2.36189535081219 2438498.098132093 1.45263814151232 788.482050750592 46.3616328411247 76.3959472016709 144013.295179722 T 19 CATAB v2.0f-lin.ifort 2020-Feb-24 08:38:31 2020-Feb-24 08:38
2009-Jun-09 07:29 00:02 Psych 0.0129614637535256 0.0129598297154609 0.0129630978275553 1.9504208778433 1.95042039924536 2454991.812067498 1.79446698810817 137.787321931792 77.3136682498059 77.4508048609525 24576.976678406 T 19 CATAB v2.0f-lin.ifort 2020-Feb-24 08:38:31 2020-Feb-24 08:38
2029-Aug-10 18:24 00:01 Amphi 0.0462130783384848 0.0462103677410179 0.0462157896446106 2.37166509640662 2.3716650439555 2462359.266700011 1.42159071331237 331.738872698501 45.9059957850591 -67.2679140793968 138931.242739455 T 19 CATAB v2.0f-lin.ifort 2020-Feb-24 08:38:31 2020-Feb-24 08:38
2094-Dec-01 13:13 00:02 Amphi 0.0456810542030518 0.0456776491008934 0.0456844760212626 2.38016214902407 2.38016209615151 2486213.051006863 1.67635777725974 1438.3128854162 45.5401476333799 -83.4574476954147 148869.282193436 T 19 CATAB v2.0f-lin.ifort 2020-Feb-24 08:38:31 2020-Feb-24 08:38
2155-May-20 08:31 00:06 Hebe 0.0307029047404955 0.0306837574926433 0.0307221205690656 5.26987856752884 5.26987852910706 2508296.854970127 6.0831571055976 2481.9981015622 49.6205047303473 -67.3698796077495 85407.8507266631 T 19 CATAB v2.0f-lin.ifort 2020-Feb-24 08:38:31 2020-Feb-24 08:38
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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