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6863 (1991 PX8)
Classification: Main-belt Asteroid          SPK-ID: 2006863
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 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07699392986057242 3.1204e-08  
a 2.296340375538544 6.6902e-09 au
q 2.119536105728329 7.3629e-08 au
i 4.183482999983173 3.2997e-06 deg
node 251.3170184154774 5.7481e-05 deg
peri 167.6719107781185 6.5065e-05 deg
M 8.676049781817211 2.9777e-05 deg
tp 2458969.868211537013
(2020-Apr-30.36821154)
0.00010511 TDB
period 1271.021273965722
3.48
5.5545e-06
1.521e-08
d
yr
n .2832368012824534 1.2378e-09 deg/d
Q 2.473144645348759 7.2053e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2128  
   data-arc span      22937 days (62.80 yr)  
   first obs. used      1958-01-12  
   last obs. used      2020-10-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46438  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 03:32:30  

Additional Information
 Earth MOID = 1.1321 au 
 Jupiter MOID = 2.7476 au 
 T_jup = 3.587 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456789.5 (2014-May-12.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07723216862742187 3.1297e-08  
q 2.118781801715824 7.3897e-08 au
tp 2456425.195477056632
(2013-May-12.69547706)
0.00010298 TDB
node 251.3574012020875 5.7538e-05 deg
peri 166.9394761614826 6.5049e-05 deg
i 4.180877245983953 3.2991e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2128  
   data-arc span      22937 days (62.80 yr)  
   first obs. used      1958-01-12  
   last obs. used      2020-10-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46438  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 03:32:30  

Additional Information
 Jupiter MOID = 2.7476 au 
 T_jup = 3.587 
Orbit Covariance (6×6)
  e q tp node peri i
e 9.79525181884499E-16 -2.305278082401451E-15 -6.430031662395325E-13 5.092838544474066E-15 -1.88104755725757E-13 -5.972040845446275E-16
q -2.305278082401451E-15 5.460758624442925E-15 1.537244658179155E-12 -1.223860204474267E-14 4.517391031354553E-13 1.494396178359676E-15
tp -6.430031662395325E-13 1.537244658179155E-12 1.060422211571097E-8 -3.409218844305798E-12 3.14292592299418E-9 2.351213036991669E-12
node 5.092838544474066E-15 -1.223860204474267E-14 -3.409218844305798E-12 3.310663281858077E-9 -3.302589627162086E-9 -2.112930655412245E-11
peri -1.88104755725757E-13 4.517391031354553E-13 3.14292592299418E-9 -3.302589627162086E-9 4.23135744647888E-9 2.17749114071822E-11
i -5.972040845446275E-16 1.494396178359676E-15 2.351213036991669E-12 -2.112930655412245E-11 2.17749114071822E-11 1.088404832633057E-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 13.8   n/a MPO395065  
diameter diameter 3.753 km 0.106 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.401   0.034 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

6863 (1991 PX8)          Discovered 1991-Aug-05 by Holt, H. E. at Palomar
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1991 PX8 = 1958 AJ = 1991 OM = 1995 TQ2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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