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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1674791947026278 2.3838e-08  
a 2.405703611002099 7.6762e-09 au
q 2.002798307538263 5.6599e-08 au
i 3.251424057317445 3.0868e-06 deg
node 58.77644781059264 6.1575e-05 deg
peri 31.18672650181364 6.3036e-05 deg
M 252.8639904174455 1.4686e-05 deg
tp 2459606.096849294817
(2022-Jan-26.59684929)		 5.6777e-05 TDB
period 1362.892516858408
3.73		 6.5231e-06
1.786e-08		 d
yr
n .2641440873340717 1.2643e-09 deg/d
Q 2.808608914465934 8.9618e-09 au
   Orbit Determination Parameters
   # obs. used (total)      2053  
   data-arc span      14595 days (39.96 yr)  
   first obs. used      1980-11-30  
   last obs. used      2020-11-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49646  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 10:13:06  

Additional Information
 Earth MOID = 1.01984 au 
 Jupiter MOID = 2.38698 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 14.26   n/a E2021B10  
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

[ hide close-approach data ]
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 27 CATAB v2.0f-lin.ifort 2021-Apr-13 10:13:12 2021-Apr-13 10:13
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 27 CATAB v2.0f-lin.ifort 2021-Apr-13 10:13:12 2021-Apr-13 10:13

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