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 ]  
74385 (1998 XH21)
Classification: Main-belt Asteroid          SPK-ID: 2074385
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 .09921349568424107 4.0198e-08  
a 3.012762216081152 1.9844e-08 au
q 2.713855544958339 1.2395e-07 au
i 1.651157093480859 5.1467e-06 deg
node 129.7316165213173 0.00013581 deg
peri 330.0063280252931 0.00013829 deg
M 43.64293722892568 2.4508e-05 deg
tp 2458768.943390584612
(2019-Oct-12.44339058)
0.00012992 TDB
period 1910.054287874332
5.23
1.8871e-05
5.167e-08
d
yr
n .1884763183357673 1.8621e-09 deg/d
Q 3.311668887203963 2.1812e-08 au
  Orbit Determination Parameters
   # obs. used (total)      892  
   data-arc span      7827 days (21.43 yr)  
   first obs. used      1998-11-15  
   last obs. used      2020-04-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55003  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 14:04:44  

Additional Information
 Earth MOID = 1.73089 au 
 Jupiter MOID = 1.81695 au 
 T_jup = 3.241 
[ 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 14.9   n/a MPO417339  
diameter diameter 5.798 km 0.257 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.053   0.008 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

74385 (1998 XH21)          Discovered 1998-Dec-10 by Spacewatch at Kitt Peak
Reference: 20040415/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
1902-Jun-27 20:33 00:03 Jupiter 1.83608549497129 1.83608505309728 1.8360859368454 2.53702639254937 2.34816170672422 2415928.356232532 3.46703490027078 120.680577386672 7.34255478474414 -83.9552807611763 2615314.86940213 T 25 CATAB v2.0f-lin.ifort 2020-May-20 14:05:02 2020-May-20 14:05
1949-Apr-18 00:53 00:02 Jupiter 1.87684879370727 1.87684826558876 1.87684932182578 2.52702533164508 2.34163539616541 2433024.536764797 2.02110335349143 53.4657970633171 11.642596124333 -79.5109656820767 2807807.52264497 T 25 CATAB v2.0f-lin.ifort 2020-May-20 14:05:02 2020-May-20 14:05
1986-Dec-18 20:46 < 00:01 Jupiter 1.92182631895799 1.92182581264726 1.92182682526871 3.26878412430801 3.13104982364595 2446783.365112842 0.882352379498249 56.0197500204773 15.9292367303055 82.4852136979905 2819001.57678074 T 25 CATAB v2.0f-lin.ifort 2020-May-20 14:05:02 2020-May-20 14:05
1996-Feb-09 08:23 < 00:01 Jupiter 1.9694788238682 1.9694784325473 1.96947921518911 2.74032929763725 2.57861508677372 2450122.849571812 0.613595674865989 46.4787672993118 10.1976517756963 -88.4758964843826 3319970.3158596 T 25 CATAB v2.0f-lin.ifort 2020-May-20 14:05:02 2020-May-20 14:05
2033-Oct-12 08:05 < 00:01 Jupiter 1.85006807154559 1.85006761320496 1.85006852988611 2.80126167028635 2.63275532867389 2463882.836672616 0.608538486054957 44.6166925516054 11.2443952092041 -89.6145376120793 2593078.35786929 T 25 CATAB v2.0f-lin.ifort 2020-May-20 14:05:02 2020-May-20 14:05
2080-Aug-02 13:09 00:02 Jupiter 1.82627682982749 1.8262763911842 1.82627726847078 2.53472577327203 2.34461934405836 2480979.047820657 2.03282325757066 82.9724910389354 7.48581343934988 -83.8151551360648 2603590.96648249 T 25 CATAB v2.0f-lin.ifort 2020-May-20 14:05:02 2020-May-20 14:05
2127-May-25 07:24 00:03 Jupiter 1.86513922861413 1.86513842985491 1.86514002737387 2.52011330101982 2.33296029062559 2498074.808540524 3.47179844856201 84.0063861942248 13.6408087900735 -72.2601505063559 2771311.9601442 T 25 CATAB v2.0f-lin.ifort 2020-May-20 14:05:02 2020-May-20 14:05
2165-Jan-26 01:00 00:05 Jupiter 1.9237600111503 1.92375874765516 1.92376127465332 3.29084442698073 3.15421407279922 2511835.541635774 4.53365118843493 225.239383005734 16.2881840148588 79.9771210945978 2697326.23740117 T 25 CATAB v2.0f-lin.ifort 2020-May-20 14:05:02 2020-May-20 14:05
2174-Mar-17 22:11 00:05 Jupiter 1.95489777457859 1.95489620817947 1.95489934097715 2.72457516663016 2.56061424835496 2515173.424262452 4.84423781375736 57.398184395071 43.1941124040347 -19.8861545293234 1247455.28716025 T 25 CATAB v2.0f-lin.ifort 2020-May-20 14:05:02 2020-May-20 14:05

Alternate Designations
 1998 XH21 = 2000 GW59 = 2002 RY188 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Sep-29 03:44 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin