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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.


Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1675312278456107 2.415e-08  
a 2.406740186717393 7.6409e-09 au
q 2.003536048131254 5.7541e-08 au
i 3.253161007532853 3.0946e-06 deg
node 58.83864202881799 6.2673e-05 deg
peri 30.87610827641856 6.4115e-05 deg
M 200.3764826388835 1.4513e-05 deg
tp 2459605.195333402873
(2022-Jan-25.69533340)		 5.6776e-05 TDB
period 1363.773481651537
3.73		 6.4945e-06
1.778e-08		 d
yr
n .2639734566212845 1.2571e-09 deg/d
Q 2.809944325303532 8.921e-09 au
   Orbit Determination Parameters
   # obs. used (total)      2029  
   data-arc span      14595 days (39.96 yr)  
   first obs. used      1980-11-30  
   last obs. used      2020-11-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49759  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-17 21:27:13  

Additional Information
 Earth MOID = 1.02084 au 
 Jupiter MOID = 2.38677 au 
 T_jup = 3.501 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456886.5 (2014-Aug-17.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1687986010132356 2.4246e-08  
q 1.998784128430008 5.7897e-08 au
tp 2456880.103974267535
(2014-Aug-10.60397427)		 4.8807e-05 TDB
node 58.89856413963297 6.2562e-05 deg
peri 30.81116105743779 6.3978e-05 deg
i 3.257212813413503 3.0986e-06 deg
   Orbit Determination Parameters
   # obs. used (total)      2029  
   data-arc span      14595 days (39.96 yr)  
   first obs. used      1980-11-30  
   last obs. used      2020-11-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49759  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-17 21:27:13  

Additional Information
 Jupiter MOID = 2.38677 au 
 T_jup = 3.501 
Orbit Covariance (6×6)
  e q tp node peri i
e 5.878616848893234E-16 -1.395699409227314E-15 4.280541238424279E-14 -9.816037502476068E-16 3.874365100508405E-15 -1.002485361722022E-16
q -1.395699409227314E-15 3.35209108634852E-15 3.691060848678267E-14 2.208465911737007E-15 2.775608531168239E-14 2.066099767014784E-16
tp 4.280541238424279E-14 3.691060848678267E-14 2.382094077251162E-9 -6.603577147871985E-12 6.672442772945621E-10 -8.526379596775999E-13
node -9.816037502476068E-16 2.208465911737007E-15 -6.603577147871985E-12 3.914048636206313E-9 -3.909173835584243E-9 -5.146308678407542E-11
peri 3.874365100508405E-15 2.775608531168239E-14 6.672442772945621E-10 -3.909173835584243E-9 4.093144071669742E-9 5.114571051730865E-11
i -1.002485361722022E-16 2.066099767014784E-16 -8.526379596775999E-13 -5.146308678407542E-11 5.114571051730865E-11 9.601455869534687E-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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