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30954 (1994 PM28)
Classification: Main-belt Asteroid          SPK-ID: 2030954
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08236972480834077 3.0266e-08  
a 2.2329542814314 7.6602e-09 au
q 2.049026451760289 7.0131e-08 au
i 3.890330398436706 4.6851e-06 deg
node 20.54237458989304 4.8622e-05 deg
peri 240.2798918734578 5.8003e-05 deg
M 79.79490374740763 3.0437e-05 deg
tp 2459126.358797888520
(2020-Oct-03.85879789)
0.0001031 TDB
period 1218.759948229052
3.34
6.2715e-06
1.717e-08
d
yr
n .2953822042832197 1.52e-09 deg/d
Q 2.41688211110251 8.2912e-09 au
  Orbit Determination Parameters
   # obs. used (total)      764  
   data-arc span      10863 days (29.74 yr)  
   first obs. used      1991-10-11  
   last obs. used      2021-07-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .60364  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 16:01:48  

Additional Information
 Earth MOID = 1.03719 au 
 Jupiter MOID = 2.61481 au 
 T_jup = 3.633 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457142.5 (2015-Apr-30.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08232548199839573 3.0256e-08  
q 2.048658090018852 6.9988e-08 au
tp 2456689.271501987903
(2014-Jan-31.77150199)
0.00010438 TDB
node 20.59435511487191 4.8637e-05 deg
peri 240.2958490225501 5.8019e-05 deg
i 3.890494565982551 4.6837e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      764  
   data-arc span      10863 days (29.74 yr)  
   first obs. used      1991-10-11  
   last obs. used      2021-07-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .60364  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 16:01:48  

Additional Information
 Jupiter MOID = 2.61481 au 
 T_jup = 3.633 
Orbit Covariance (6×6)
  e q tp node peri i
e 9.154455232893083E-16 -2.108205777228032E-15 -5.305633108105807E-13 -2.784780359066201E-15 -1.611705065007688E-13 3.451145653949279E-16
q -2.108205777228032E-15 4.898349083190164E-15 1.0621561624223E-12 5.935701508188059E-15 3.270844124996732E-13 -5.542661019413477E-16
tp -5.305633108105807E-13 1.0621561624223E-12 1.089486280510908E-8 -1.860889377126813E-11 3.308192062688059E-9 -6.497082491720108E-12
node -2.784780359066201E-15 5.935701508188059E-15 -1.860889377126813E-11 2.365595010192636E-9 -2.365423783560978E-9 -4.43668125748026E-11
peri -1.611705065007688E-13 3.270844124996732E-13 3.308192062688059E-9 -2.365423783560978E-9 3.366242772508187E-9 4.236016809778409E-11
i 3.451145653949279E-16 -5.542661019413477E-16 -6.497082491720108E-12 -4.43668125748026E-11 4.236016809778409E-11 2.193716498025027E-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 16.26   n/a E2021B10  
diameter diameter 1.692 km 0.355 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.269   0.089 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

30954 (1994 PM28)          Discovered 1994-Aug-12 by Elst, E. W. at La Silla
Reference: 20011130/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1994 PM28 = 1991 TB11 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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