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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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Orbit Diagram
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Note: This Java-based orbit viewer will eventually be retired.

Note: Make sure you have Java enabled on your browser to see the applet. This applet is provided as a 3D orbit visualization tool. The applet 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. For accurate long-term ephemerides, please instead use our Horizons system.

Note: If the applet is not working, here are some notes that might help.
Orbit Viewer

Additional Notes: the orbits shown in the applet are color coded. The planets are white lines, and the asteroid/comet is a blue line. The bright white line indicates the portion of the orbit that is above the ecliptic plane, and the darker portion is below the ecliptic plane. Likewise for the asteroid/comet orbit, the light blue indicates the portion above the ecliptic plane, and the dark blue the portion below the ecliptic plane.

Orbit Viewer applet originally written and kindly provided by Osamu Ajiki (AstroArts), and further modified by Ron Baalke (JPL).


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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