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JPL Small-Body Database Browser
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49694 (1999 US41)
Classification: Main-belt Asteroid          SPK-ID: 2049694
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 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2131470433251622 4.0867e-08  
a 2.271615206966136 1.0153e-08 au
q 1.787427142028827 9.432e-08 au
i 21.52107834098542 5.5398e-06 deg
node 205.5852768225148 1.1323e-05 deg
peri 145.2934847398473 1.7174e-05 deg
M 43.74978421067354 1.1482e-05 deg
tp 2458848.524356005173
(2019-Dec-31.02435601)
3.9755e-05 TDB
period 1250.548610129832
3.42
8.3842e-06
2.295e-08
d
yr
n .2878736556771071 1.93e-09 deg/d
Q 2.755803271903444 1.2317e-08 au
  Orbit Determination Parameters
   # obs. used (total)      859  
   data-arc span      7940 days (21.74 yr)  
   first obs. used      1998-04-21  
   last obs. used      2020-01-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51955  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 09:32:53  

Additional Information
 Earth MOID = .814521 au 
 Jupiter MOID = 2.78713 au 
 T_jup = 3.492 
[ 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 15.2   n/a MPO432054  

49694 (1999 US41)          Discovered 1999-Oct-18 by LONEOS at Anderson Mesa
Reference: 20021120/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
2010-Feb-28 23:42 < 00:01 Juno 0.0349572817472802 0.0349560398882557 0.0349585236169052 7.03097037611011 7.03097032661149 2455256.487337910 0.278863341297854 72.7965370788617 37.7619470917498 -37.9776117962863 102281.737406767 T 18 CATAB v2.0f-lin.ifort 2020-Feb-23 09:32:59 2020-Feb-23 09:33
2037-Aug-16 16:40 < 00:01 Hebe 0.0237774800834107 0.0237765084155721 0.0237784525356358 7.95182067665103 7.95182064377154 2465287.194168221 0.272699594063373 336.628503471642 36.9799953324102 84.6278738778652 95753.6749416051 T 18 CATAB v2.0f-lin.ifort 2020-Feb-23 09:32:59 2020-Feb-23 09:33
2066-Aug-08 20:27 < 00:01 Amphi 0.0170756440797002 0.017074539297639 0.0170767510715429 8.52496156595455 8.52496152646306 2475871.351921622 0.549066187032732 459.130688580488 40.8364465005203 -85.3528838349488 62340.3630900545 T 18 CATAB v2.0f-lin.ifort 2020-Feb-23 09:32:59 2020-Feb-23 09:33

Alternate Designations
 1999 US41 = 1998 HU74 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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