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 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1675312314835148 2.5455e-08  
a 2.406740187109716 7.711e-09 au
q 2.00353603970236 6.0443e-08 au
i 3.253164070604881 3.5849e-06 deg
node 58.83858715616445 7.0257e-05 deg
peri 30.87615813324668 7.2192e-05 deg
M 200.3764865506453 1.6534e-05 deg
tp 2459605.195318731961
(2022-Jan-25.69531873)		 6.4037e-05 TDB
period 1363.773481985
3.73		 6.5541e-06
1.794e-08		 d
yr
n .2639734565567389 1.2686e-09 deg/d
Q 2.809944334517072 9.0028e-09 au
   Orbit Determination Parameters
   # obs. used (total)      1907  
   data-arc span      14094 days (38.59 yr)  
   first obs. used      1980-11-30  
   last obs. used      2019-07-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50329  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 09:17:08  

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

[ 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 23 CATAB v2.0f-lin.ifort 2020-Feb-23 09:17:22 2020-Feb-23 09:17
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 23 CATAB v2.0f-lin.ifort 2020-Feb-23 09:17:22 2020-Feb-23 09:17

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-24 22:00 UT
(server date/time)   		NASA Home Page
Site Manager:   Ryan S. Park
Webmaster:   Alan B. Chamberlin