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 ]  
40000 (1998 HZ87)
Classification: Main-belt Asteroid          SPK-ID: 2040000
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 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1317293081644831 3.6176e-08  
a 2.591192465368481 1.5476e-08 au
q 2.249856474584469 9.2879e-08 au
i 13.76012698619096 6.7799e-06 deg
node 229.4320955141268 1.525e-05 deg
peri 118.7956135896831 3.2998e-05 deg
M 347.3362871158328 3.0699e-05 deg
tp 2459054.092805200904
(2020-Jul-23.59280520)
0.00013022 TDB
period 1523.519211845595
4.17
1.3649e-05
3.737e-08
d
yr
n .2362950182714763 2.1169e-09 deg/d
Q 2.932528456152492 1.7515e-08 au
  Orbit Determination Parameters
   # obs. used (total)      796  
   data-arc span      7765 days (21.26 yr)  
   first obs. used      1998-04-21  
   last obs. used      2019-07-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55871  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 05:40:50  

Additional Information
 Earth MOID = 1.28136 au 
 Jupiter MOID = 2.56742 au 
 T_jup = 3.367 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457035.5 (2015-Jan-13.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1329826544714195 3.6552e-08  
q 2.245784342854208 9.3967e-08 au
tp 2457532.977203758715
(2016-May-24.47720376)
0.00012138 TDB
node 229.4734161596659 1.5232e-05 deg
peri 119.368113144165 3.2759e-05 deg
i 13.7702390011206 6.7844e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      796  
   data-arc span      7765 days (21.26 yr)  
   first obs. used      1998-04-21  
   last obs. used      2019-07-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55871  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 05:40:50  

Additional Information
 Jupiter MOID = 2.56742 au 
 T_jup = 3.367 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.33605453765533E-15 -3.402065352880331E-15 1.848588229794135E-12 -5.925103693545145E-15 4.71054612957424E-13 1.432656040519155E-15
q -3.402065352880331E-15 8.829889712141214E-15 -3.960621676776317E-12 1.189656066570047E-14 -1.034538134382121E-12 -2.274152562043295E-15
tp 1.848588229794135E-12 -3.960621676776317E-12 1.473374270623129E-8 -4.598211250827095E-11 3.524575829173176E-9 1.252336071252331E-11
node -5.925103693545145E-15 1.189656066570047E-14 -4.598211250827095E-11 2.320160452680407E-10 -2.357566699015589E-10 2.028472458995846E-11
peri 4.71054612957424E-13 -1.034538134382121E-12 3.524575829173176E-9 -2.357566699015589E-10 1.07315452251022E-9 -1.677457466156438E-11
i 1.432656040519155E-15 -2.274152562043295E-15 1.252336071252331E-11 2.028472458995846E-11 -1.677457466156438E-11 4.602843976403839E-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 14.9   n/a MPO337582  

40000 (1998 HZ87)          Discovered 1998-Apr-21 by LINEAR at Socorro
Reference: 20020526/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1998 HZ87 = 1999 TD107 
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-06 02:43 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin