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48955 (1998 QE23)
Classification: Main-belt Asteroid          SPK-ID: 2048955
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1675312280295772 2.4159e-08  
a 2.406740186742381 7.6416e-09 au
q 2.003536047709296 5.7561e-08 au
i 3.253161071437863 3.0974e-06 deg
node 58.83864145275178 6.2684e-05 deg
peri 30.87610871399779 6.4127e-05 deg
M 200.3764827379126 1.4517e-05 deg
tp 2459605.195333037143
(2022-Jan-25.69533304)
5.679e-05 TDB
period 1363.773481672776
3.73
6.4951e-06
1.778e-08
d
yr
n .2639734566171734 1.2572e-09 deg/d
Q 2.809944325775466 8.9218e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2025  
   data-arc span      14566 days (39.88 yr)  
   first obs. used      1980-11-30  
   last obs. used      2020-10-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49763  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 23:35:02  

Additional Information
 Earth MOID = 1.02084 au 
 Jupiter MOID = 2.38677 au 
 T_jup = 3.501 
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Orbital Elements at Epoch 2456881.5 (2014-Aug-12.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1687898809865404 2.4256e-08  
q 1.998784190103216 5.7917e-08 au
tp 2456880.105128666401
(2014-Aug-10.60512867)
4.8829e-05 TDB
node 58.89873549824601 6.2573e-05 deg
peri 30.81143079152206 6.399e-05 deg
i 3.257228338900027 3.1014e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2025  
   data-arc span      14566 days (39.88 yr)  
   first obs. used      1980-11-30  
   last obs. used      2020-10-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49763  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 23:35:02  

Additional Information
 Jupiter MOID = 2.38677 au 
 T_jup = 3.501 
Orbit Covariance (6×6)
  e q tp node peri i
e 5.883347484295757E-16 -1.396750560784626E-15 4.188480757446686E-14 -9.834842234830562E-16 3.562894652297377E-15 -1.000551030271084E-16
q -1.396750560784626E-15 3.354424016648251E-15 3.905426036504871E-14 2.204035278772065E-15 2.848647274399494E-14 2.066818305652322E-16
tp 4.188480757446686E-14 3.905426036504871E-14 2.384253964320509E-9 -6.588336082153778E-12 6.679547978398186E-10 -8.550412388170148E-13
node -9.834842234830562E-16 2.204035278772065E-15 -6.588336082153778E-12 3.91539065553022E-9 -3.910509127363801E-9 -5.161753525445474E-11
peri 3.562894652297377E-15 2.848647274399494E-14 6.679547978398186E-10 -3.910509127363801E-9 4.094716599527937E-9 5.129920240783865E-11
i -1.000551030271084E-16 2.066818305652322E-16 -8.550412388170148E-13 -5.161753525445474E-11 5.129920240783865E-11 9.618747012727266E-12

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 14.2   n/a MPO337649  
diameter diameter 3.840 km 0.904 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
geometric albedo albedo 0.274   0.154 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

48955 (1998 QE23)          Discovered 1998-Aug-17 by LINEAR at Socorro
Reference: 20021120/Numbers.arcLast Updated: 2004-04-19

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Alternate Designations
 1998 QE23 = 1980 WM1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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