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 ]  
18673 (1998 FH66)
Classification: Outer Main-belt Asteroid          SPK-ID: 2018673
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 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09316836717642718 3.4668e-08  
a 3.251209924741561 2.0805e-08 au
q 2.948300004705595 1.1145e-07 au
i .2171484994507873 3.9545e-06 deg
node 250.1288726162569 0.0011713 deg
peri 39.56647499127089 0.0011716 deg
M 197.8731271749065 2.3823e-05 deg
tp 2459964.813951375964
(2023-Jan-20.31395138)
0.00014094 TDB
period 2141.242944159322
5.86
2.0554e-05
5.627e-08
d
yr
n .1681266485813642 1.6138e-09 deg/d
Q 3.554119844777527 2.2744e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1620  
   data-arc span      10613 days (29.06 yr)  
   first obs. used      1991-01-12  
   last obs. used      2020-02-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54294  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 22:31:33  

Additional Information
 Earth MOID = 1.932 au 
 Jupiter MOID = 1.58888 au 
 T_jup = 3.174 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456441.5 (2013-May-29.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09393139077606712 3.5015e-08  
q 2.946183827993403 1.1168e-07 au
tp 2455647.473486546262
(2011-Mar-26.97348655)
0.00014398 TDB
node 252.2378848066212 0.0011535 deg
peri 32.37365190327139 0.0011537 deg
i .2196684504968983 3.9674e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1620  
   data-arc span      10613 days (29.06 yr)  
   first obs. used      1991-01-12  
   last obs. used      2020-02-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54294  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 22:31:33  

Additional Information
 Jupiter MOID = 1.58888 au 
 T_jup = 3.174 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.226080068867139E-15 -3.860848486971168E-15 -8.461152124861463E-14 -8.21961487485262E-15 1.51007672193558E-16 5.178411974282519E-17
q -3.860848486971168E-15 1.247141361474401E-14 -1.49732852889622E-13 1.487709146113049E-16 -1.927754218851706E-14 -1.456454071391394E-16
tp -8.461152124861463E-14 -1.49732852889622E-13 2.073027336894756E-8 -7.51906212166475E-11 3.55162345269535E-9 5.450813543802382E-13
node -8.21961487485262E-15 1.487709146113049E-16 -7.51906212166475E-11 1.330493353354854E-6 -1.330500680825317E-6 -4.531565599840237E-10
peri 1.51007672193558E-16 -1.927754218851706E-14 3.55162345269535E-9 -1.330500680825317E-6 1.331101703382847E-6 4.532426463831133E-10
i 5.178411974282519E-17 -1.456454071391394E-16 5.450813543802382E-13 -4.531565599840237E-10 4.532426463831133E-10 1.574001243138719E-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 13.7   n/a MPO452435  
diameter diameter 9.908 km 0.029 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.072   0.013 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18673 (1998 FH66)          Discovered 1998-Mar-20 by LINEAR at Socorro
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Jun-04 09:20 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin