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JPL Small-Body Database Browser
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20830 Luyajia (2000 UG45)
Classification: Main-belt Asteroid          SPK-ID: 2020830
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 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .01778747558442983 3.1901e-08  
a 2.932313778603064 1.5749e-08 au
q 2.880155318860275 8.9935e-08 au
i 2.962972707041882 4.5219e-06 deg
node 148.8192767684394 6.7771e-05 deg
peri 79.85702332294282 0.00014923 deg
M 141.7314831540565 0.00013329 deg
tp 2458278.432297883471
(2018-Jun-08.93229788)
0.00067898 TDB
period 1834.062319656962
5.02
1.4776e-05
4.045e-08
d
yr
n .1962855875406314 1.5813e-09 deg/d
Q 2.984472238345854 1.6029e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1496  
   data-arc span      15595 days (42.70 yr)  
   first obs. used      1977-02-19  
   last obs. used      2019-11-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56027  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 04:25:21  

Additional Information
 Earth MOID = 1.87099 au 
 Jupiter MOID = 1.9797 au 
 T_jup = 3.274 
[ 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 14.2   n/a MPO347685  

20830 Luyajia           Discovered 2000 Oct. 24 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Lu Yajia (b. 1984) was awarded second place in the 2004 Intel International Science and Engineering Fair for her environmental science team project. She also received the Intel Foundation Achievement Award. She attends the Wusong High School, Shanghai, China.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20041226/MPCPages.arcLast Updated: 2004-12-25

[ 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
1940-Jan-07 08:00 00:02 Jupiter 1.98629390387743 1.98629359971725 1.98629420803772 3.56004321643669 3.43817399891161 2429635.833022833 1.77131177950168 101.264187326324 11.2535632383371 88.2816987365397 4663255.79520748 T 25 CATAB v2.0f-lin.ifort 2019-Nov-07 04:25:29 2019-Nov-07 04:25
2070-Nov-30 04:37 00:01 Jupiter 1.987648055364 1.9876477637895 1.98764834693851 3.53500725327953 3.41232912669313 2477445.692332817 1.37072577823929 76.5822802418873 10.7686717269459 -88.7776172376961 4892489.99501431 T 25 CATAB v2.0f-lin.ifort 2019-Nov-07 04:25:29 2019-Nov-07 04:25

Alternate Designations
 2000 UG45 = 1977 DE7 = 1998 KJ7 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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