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91844 (1999 UR2)
Classification: Main-belt Asteroid          SPK-ID: 2091844
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 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04421471112562888 4.4991e-08  
a 3.090312662798052 2.9369e-08 au
q 2.953675381124564 1.4248e-07 au
i 7.433969310658072 5.4831e-06 deg
node 249.5908047033252 4.3064e-05 deg
peri 35.67310723269716 9.8015e-05 deg
M 34.06947445114393 8.3628e-05 deg
tp 2458812.713229752358
(2019-Nov-25.21322975)
0.00046214 TDB
period 1984.275906166233
5.43
2.8286e-05
7.744e-08
d
yr
n .1814263827330073 2.5863e-09 deg/d
Q 3.226949944471541 3.0667e-08 au
  Orbit Determination Parameters
   # obs. used (total)      604  
   data-arc span      7601 days (20.81 yr)  
   first obs. used      1999-10-12  
   last obs. used      2020-08-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56035  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 08:20:19  

Additional Information
 Earth MOID = 1.94106 au 
 Jupiter MOID = 1.85018 au 
 T_jup = 3.211 
[ 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 14.3   n/a MPO436414  

91844 (1999 UR2)          Discovered 1999-Oct-19 by Kusnirak, P., Pravec, P. at Ondrejov
Reference: 20041028/Numbers.arcLast Updated: 2004-10-29

[ 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
1929-May-18 18:16 00:04 Jupiter 1.87095130366468 1.87095070306168 1.8709519042697 3.7353648073909 3.61213294707511 2425750.261108174 3.72921328741757 233.693698247392 23.4538735008301 88.0757063446353 2720477.18433652 T 20 CATAB v2.0f-lin.ifort 2020-Aug-25 08:20:31 2020-Aug-25 08:20
1989-Aug-21 10:20 00:01 Jupiter 1.92657846040294 1.92657784180635 1.92657907899975 3.8475758443329 3.73155965980883 2447759.930885647 1.06828376296063 80.4759447932955 26.2476938310214 82.7202547806845 3108017.50225854 T 20 CATAB v2.0f-lin.ifort 2020-Aug-25 08:20:31 2020-Aug-25 08:20
1999-Aug-09 04:31 < 00:01 Jupiter 1.92881592429277 1.92881528037433 1.92881656821121 3.58898361719576 3.46446547524153 2451399.688245650 0.726098740133153 61.9437146393895 26.3996157445984 -89.9769372422769 2384521.81857477 T 20 CATAB v2.0f-lin.ifort 2020-Aug-25 08:20:31 2020-Aug-25 08:20
2059-Nov-19 22:45 00:02 Jupiter 1.87093916207449 1.87093852107408 1.87093980307617 3.76869518249607 3.64658904809226 2473417.447582558 2.02095241555586 134.230006708854 21.2932949888175 -81.8589848412702 2668142.22750266 T 20 CATAB v2.0f-lin.ifort 2020-Aug-25 08:20:31 2020-Aug-25 08:20
2120-Feb-22 04:44 00:05 Jupiter 1.92850012160712 1.92849915086077 1.92850109235971 3.82800112713084 3.71149113299528 2495425.697423567 4.61352811252327 214.544795726091 24.5808923609142 78.6716004019062 3105324.97948082 T 20 CATAB v2.0f-lin.ifort 2020-Aug-25 08:20:31 2020-Aug-25 08:20
2130-Feb-11 08:10 00:05 Jupiter 1.92771662788385 1.92771509641899 1.92771815936208 3.6578060418566 3.53564164143773 2499067.840451369 5.2023440331054 287.110921332324 22.8908807999672 -75.9627728560274 2580184.31816386 T 20 CATAB v2.0f-lin.ifort 2020-Aug-25 08:20:31 2020-Aug-25 08:20
2190-May-23 20:15 00:08 Jupiter 1.87061061273983 1.8706099698842 1.87061125561246 3.80149824475735 3.68045896332736 2521084.343751767 7.72059050814503 481.842826101504 22.2251077742911 -87.719002875999 2733129.76027462 T 20 CATAB v2.0f-lin.ifort 2020-Aug-25 08:20:31 2020-Aug-25 08:20
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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