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17491 (1991 UM3)
Classification: Main-belt Asteroid          SPK-ID: 2017491
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2021837724869063 3.6927e-08  
a 2.778072315298277 1.4013e-08 au
q 2.216391174349837 1.0493e-07 au
i 9.431917577608125 3.9915e-06 deg
node 59.00079072751632 2.3691e-05 deg
peri 291.1768154734311 2.5529e-05 deg
M 146.9337896757151 1.0644e-05 deg
tp 2458510.207863885539
(2019-Jan-26.70786389)
4.8466e-05 TDB
period 1691.273120700556
4.63
1.2796e-05
3.503e-08
d
yr
n .2128574004953626 1.6105e-09 deg/d
Q 3.339753456246716 1.6846e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1646  
   data-arc span      10733 days (29.39 yr)  
   first obs. used      1991-10-31  
   last obs. used      2021-03-20  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48132  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 02:33:38  

Additional Information
 Earth MOID = 1.23056 au 
 Jupiter MOID = 2.17521 au 
 T_jup = 3.285 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457042.5 (2015-Jan-20.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .204054310247661 3.727e-08  
q 2.209369378954065 1.0603e-07 au
tp 2456813.374210787581
(2014-Jun-04.87421079)
4.5586e-05 TDB
node 59.21712054121127 2.3792e-05 deg
peri 289.9598011491244 2.5518e-05 deg
i 9.417223006894917 3.9837e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1646  
   data-arc span      10733 days (29.39 yr)  
   first obs. used      1991-10-31  
   last obs. used      2021-03-20  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48132  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 02:33:38  

Additional Information
 Jupiter MOID = 2.17521 au 
 T_jup = 3.285 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.389043463616034E-15 -3.930871531281487E-15 3.510754180262058E-13 4.78960719365327E-15 3.474367573425242E-14 1.34303320682E-15
q -3.930871531281487E-15 1.12431637450697E-14 -9.685901526278891E-13 -1.359909679259843E-14 -9.128022674247325E-14 -3.290225660546726E-15
tp 3.510754180262058E-13 -9.685901526278891E-13 2.078120956320428E-9 -2.708912624574087E-12 4.368065196753906E-10 2.518261882031449E-13
node 4.78960719365327E-15 -1.359909679259843E-14 -2.708912624574087E-12 5.660695153924813E-10 -5.587541023487682E-10 -8.148722625008733E-12
peri 3.474367573425242E-14 -9.128022674247325E-14 4.368065196753906E-10 -5.587541023487682E-10 6.511702023694943E-10 8.031886424109619E-12
i 1.34303320682E-15 -3.290225660546726E-15 2.518261882031449E-13 -8.148722625008733E-12 8.031886424109619E-12 1.586988864720409E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.87   n/a MPCxxxxx  
diameter diameter 10.230 km 2.172 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)  
geometric albedo albedo 0.056   0.034 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)  

17491 (1991 UM3)          Discovered 1991-Oct-31 by Ueda, S., Kaneda, H. at Kushiro
Reference: 20001013/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1991 UM3 = 1999 JG13 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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