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
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 ]

[ hide orbit diagram ]

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.


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 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456942.5 (2014-Oct-12.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .168894172887267 2.3985e-08  
q 1.998770738826421 5.7198e-08 au
tp 2456880.085963093117
(2014-Aug-10.58596309)
4.8716e-05 TDB
node 58.89540665183716 6.1387e-05 deg
peri 30.80692948826624 6.2819e-05 deg
i 3.257029579472696 3.0918e-06 deg
  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
 Jupiter MOID = 2.38698 au 
 T_jup = 3.501 
Orbit Covariance (6×6)
  e q tp node peri i
e 5.75280431605026E-16 -1.363892475728704E-15 3.35376433878239E-14 -8.66887972887832E-16 -1.005366830230326E-16 -9.494275942366836E-17
q -1.363892475728704E-15 3.271612448592457E-15 6.071089275555885E-14 2.022247713333152E-15 3.782833634478168E-14 1.851626276664514E-16
tp 3.35376433878239E-14 6.071089275555885E-14 2.373213001408789E-9 -6.034956284672285E-12 6.632001879504659E-10 -8.423289657199772E-13
node -8.66887972887832E-16 2.022247713333152E-15 -6.034956284672285E-12 3.768367588751394E-9 -3.76359358442694E-9 -5.358541925584471E-11
peri -1.005366830230326E-16 3.782833634478168E-14 6.632001879504659E-10 -3.76359358442694E-9 3.946281619532693E-9 5.326804795815042E-11
i -9.494275942366836E-17 1.851626276664514E-16 -8.423289657199772E-13 -5.358541925584471E-11 5.326804795815042E-11 9.559064591838623E-12

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 14.27   n/a MPCxxxxx  
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 ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-May-10 22:39 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin