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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 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1675312297723617 2.5351e-08  
a 2.406740186920086 7.7053e-09 au
q 2.0035360436628 6.0212e-08 au
i 3.253163469054289 3.5565e-06 deg
node 58.83859823996488 6.9684e-05 deg
peri 30.87614924924243 7.1578e-05 deg
M 200.3764848275554 1.6371e-05 deg
tp 2459605.195325188006
(2022-Jan-25.69532519)
6.3449e-05 TDB
period 1363.77348182382
3.73
6.5493e-06
1.793e-08
d
yr
n .263973456587937 1.2677e-09 deg/d
Q 2.809944330177372 8.9962e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1935  
   data-arc span      14444 days (39.55 yr)  
   first obs. used      1980-11-30  
   last obs. used      2020-06-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50468  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 21:50:43  

Additional Information
 Earth MOID = 1.02084 au 
 Jupiter MOID = 2.38677 au 
 T_jup = 3.501 
[ show covariance matrix ]

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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Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
2038-Aug-24 03:08 < 00:01 Iris 0.0472367617389874 0.0472346049317773 0.0472389187009037 4.14404968951299 4.14404966014543 2465659.630764492 0.545212870300892 178.10015745316 33.9052417738065 54.3009440358649 170743.894819478 T 24 CATAB v2.0f-lin.ifort 2020-Jun-23 21:51:02 2020-Jun-23 21:51
2125-May-26 07:00 00:03 Amphi 0.0447374654568283 0.0447272543257444 0.0447476785933523 2.58144801152562 2.58144796174753 2497345.791581204 3.1194337708319 694.615858688778 33.5871944856642 42.9704086962273 135835.197835237 T 24 CATAB v2.0f-lin.ifort 2020-Jun-23 21:51:02 2020-Jun-23 21:51

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