Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
IMPORTANT: The SSD Announcement email list is now available. Major changes are coming in the near future, including possible hostname and/or URL changes. To be notified of such changes, subscribe to this email list.

Please visit this page for more details.


JPL Small-Body Database Browser
Search: [ help ]  
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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1675311838158765 2.5954e-08  
a 2.40674018312781 7.9568e-09 au
q 2.003536151111168 6.1684e-08 au
i 3.253160816534566 3.595e-06 deg
node 58.83861264124624 7.1792e-05 deg
peri 30.87614137027643 7.3756e-05 deg
M 200.3764791757441 1.6799e-05 deg
tp 2459605.195345169316
(2022-Jan-25.69534517)
6.511e-05 TDB
period 1363.773478600494
3.73
6.763e-06
1.852e-08
d
yr
n .2639734572118475 1.3091e-09 deg/d
Q 2.809944215144451 9.2898e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1851  
   data-arc span      14041 days (38.44 yr)  
   first obs. used      1980-11-30  
   last obs. used      2019-05-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48544  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 04:39:38  

Additional Information
 Earth MOID = 1.02084 au 
 Jupiter MOID = 2.38677 au 
 T_jup = 3.501 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456534.5 (2013-Aug-30.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1685824037185656 2.609e-08  
q 1.999100895005484 6.2067e-08 au
tp 2456880.050173828621
(2014-Aug-10.55017383)
5.8509e-05 TDB
node 58.90143318997869 7.1656e-05 deg
peri 30.77853659712703 7.3585e-05 deg
i 3.257380717622246 3.6002e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1851  
   data-arc span      14041 days (38.44 yr)  
   first obs. used      1980-11-30  
   last obs. used      2019-05-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48544  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 04:39:38  

Additional Information
 Jupiter MOID = 2.38677 au 
 T_jup = 3.501 
Orbit Covariance (6×6)
  e q tp node peri i
e 6.807116966609839E-16 -1.610532938120128E-15 -1.923854689383924E-13 3.835159953626771E-15 -7.846619333191582E-14 -3.095186865582766E-16
q -1.610532938120128E-15 3.852257086719977E-15 5.856999553147909E-13 -8.837345761430328E-15 2.189867439635632E-13 6.645364171613079E-16
tp -1.923854689383924E-13 5.856999553147909E-13 3.423352789864494E-9 9.875692702120466E-13 9.964241300435704E-10 -1.832854127316796E-12
node 3.835159953626771E-15 -8.837345761430328E-15 9.875692702120466E-13 5.134543848215835E-9 -5.125631845637377E-9 -1.064077002218918E-10
peri -7.846619333191582E-14 2.189867439635632E-13 9.964241300435704E-10 -5.125631845637377E-9 5.414753172893027E-9 1.057165152102276E-10
i -3.095186865582766E-16 6.645364171613079E-16 -1.832854127316796E-12 -1.064077002218918E-10 1.057165152102276E-10 1.296116358841601E-11

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

[ show close-approach data ]
Alternate Designations
 1998 QE23 = 1980 WM1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Feb-19 13:28 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin