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 ]  
49380 (1998 XU4)
Classification: Main-belt Asteroid          SPK-ID: 2049380
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 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04052266268848671 4.0632e-08  
a 2.834254648790669 1.5809e-08 au
q 2.71940310368445 1.1368e-07 au
i 2.48546248614974 5.2291e-06 deg
node 42.26314952610634 0.00010597 deg
peri 41.65717821631538 0.00013003 deg
M 191.3623578278636 7.5133e-05 deg
tp 2459816.910814663446
(2022-Aug-25.41081466)
0.00036568 TDB
period 1742.836827490953
4.77
1.4582e-05
3.992e-08
d
yr
n .2065597847839079 1.7282e-09 deg/d
Q 2.949106193896889 1.6449e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1320  
   data-arc span      8815 days (24.13 yr)  
   first obs. used      1995-03-23  
   last obs. used      2019-05-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51797  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 04:40:45  

Additional Information
 Earth MOID = 1.73595 au 
 Jupiter MOID = 2.13381 au 
 T_jup = 3.309 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456276.5 (2012-Dec-15.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04395317287640312 4.0384e-08  
q 2.70935062163266 1.1365e-07 au
tp 2456339.833136656702
(2013-Feb-16.33313666)
0.00033073 TDB
node 42.38219836862539 0.00010561 deg
peri 42.53791970345156 0.00012649 deg
i 2.490474365611337 5.2371e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1320  
   data-arc span      8815 days (24.13 yr)  
   first obs. used      1995-03-23  
   last obs. used      2019-05-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51797  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 04:40:45  

Additional Information
 Jupiter MOID = 2.13381 au 
 T_jup = 3.309 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.630902109270935E-15 -4.548980206638586E-15 -2.866312898439569E-12 6.818838296353813E-15 -6.714172491045837E-13 -1.704811852420224E-16
q -4.548980206638586E-15 1.291701273902322E-14 9.048596267555624E-12 -1.562369185619285E-14 2.088358001982632E-12 3.460818358480382E-16
tp -2.866312898439569E-12 9.048596267555624E-12 1.093803345209087E-7 -5.115420956185774E-11 2.30438708229259E-8 -5.816212902357729E-12
node 6.818838296353813E-15 -1.562369185619285E-14 -5.115420956185774E-11 1.115316417957195E-8 -1.115321756833478E-8 -1.812472605150605E-10
peri -6.714172491045837E-13 2.088358001982632E-12 2.30438708229259E-8 -1.115321756833478E-8 1.600002604920718E-8 1.798664715002488E-10
i -1.704811852420224E-16 3.460818358480382E-16 -5.816212902357729E-12 -1.812472605150605E-10 1.798664715002488E-10 2.742715805988368E-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 MPO395468  
diameter diameter 3.646 km 0.767 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.334   0.129 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

49380 (1998 XU4)          Discovered 1998-Dec-12 by Kobayashi, T. at Oizumi
Reference: 20021120/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1998 XU4 = 2000 FJ8 
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 09:46 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin