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71048 (1999 XA87)
Classification: Main-belt Asteroid          SPK-ID: 2071048
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 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2096118338987144 4.9375e-08  
a 2.695013891587069 1.6156e-08 au
q 2.130107087388992 1.3743e-07 au
i 12.03262972969968 4.3532e-06 deg
node 277.8160741233658 2.6919e-05 deg
peri 113.5092864588553 2.9558e-05 deg
M 278.9891026257832 1.298e-05 deg
tp 2459364.147730280368
(2021-May-29.64773028)
6.0146e-05 TDB
period 1615.994725946559
4.42
1.4532e-05
3.979e-08
d
yr
n .2227730042801546 2.0033e-09 deg/d
Q 3.259920695785146 1.9543e-08 au
  Orbit Determination Parameters
   # obs. used (total)      981  
   data-arc span      7538 days (20.64 yr)  
   first obs. used      1999-10-12  
   last obs. used      2020-06-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49302  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 23:37:58  

Additional Information
 Earth MOID = 1.16981 au 
 Jupiter MOID = 2.28805 au 
 T_jup = 3.307 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457061.5 (2015-Feb-08.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2122607641752355 4.9196e-08  
q 2.11945959500516 1.3688e-07 au
tp 2457751.264887398354
(2016-Dec-28.76488740)
5.1961e-05 TDB
node 277.8515381877127 2.6958e-05 deg
peri 113.8075630629949 2.951e-05 deg
i 12.0321102296466 4.3527e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      981  
   data-arc span      7538 days (20.64 yr)  
   first obs. used      1999-10-12  
   last obs. used      2020-06-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49302  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 23:37:58  

Additional Information
 Jupiter MOID = 2.28805 au 
 T_jup = 3.307 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.420221203872574E-15 -6.708275851044051E-15 -1.010447345029825E-12 8.158791123383846E-15 -2.41448016886967E-13 -1.031165913006897E-14
q -6.708275851044051E-15 1.873614739105187E-14 2.970453527521064E-12 -1.904084606808536E-14 6.890684208818838E-13 2.963018213984883E-14
tp -1.010447345029825E-12 2.970453527521064E-12 2.699905380013229E-9 1.715435456927539E-12 6.587144346361374E-10 9.091590123853932E-12
node 8.158791123383846E-15 -1.904084606808536E-14 1.715435456927539E-12 7.267397670527792E-10 -7.101771477461837E-10 4.065975701698697E-12
peri -2.41448016886967E-13 6.890684208818838E-13 6.587144346361374E-10 -7.101771477461837E-10 8.708613301008985E-10 -1.91839552471616E-12
i -1.031165913006897E-14 2.963018213984883E-14 9.091590123853932E-12 4.065975701698697E-12 -1.91839552471616E-12 1.894578020817802E-11

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 14.1   n/a MPO474590  
diameter diameter 5.509 km 0.472 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.133   0.008 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

71048 (1999 XA87)          Discovered 1999-Dec-07 by LINEAR at Socorro
Reference: 20031109/Numbers.arcLast Updated: 2004-04-19

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