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 ]  
18717 (1998 HZ127)
Classification: Outer Main-belt Asteroid          SPK-ID: 2018717
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 .1141254481688321 3.7563e-08  
a 3.206350641608946 2.3176e-08 au
q 2.840424437648903 1.2053e-07 au
i .9666405930714179 5.2274e-06 deg
node 199.0063972087287 0.00024515 deg
peri 62.84417427815831 0.0002466 deg
M 257.4249509260143 3.0225e-05 deg
tp 2459598.022386649296
(2022-Jan-18.52238665)
0.00017882 TDB
period 2097.079759022026
5.74
2.2737e-05
6.225e-08
d
yr
n .1716672904076315 1.8612e-09 deg/d
Q 3.572276845568989 2.5821e-08 au
  Orbit Determination Parameters
   # obs. used (total)      879  
   data-arc span      21652 days (59.28 yr)  
   first obs. used      1960-09-24  
   last obs. used      2020-01-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57649  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-29 00:51:49  

Additional Information
 Earth MOID = 1.82507 au 
 Jupiter MOID = 1.48901 au 
 T_jup = 3.182 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456487.5 (2013-Jul-14.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1138153859899961 3.8857e-08  
q 2.849845003885099 1.2579e-07 au
tp 2457482.841447682649
(2016-Apr-04.34144768)
0.00016875 TDB
node 199.7416968005612 0.00024555 deg
peri 58.93954144057501 0.00024693 deg
i .9641394222798105 5.2245e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      879  
   data-arc span      21652 days (59.28 yr)  
   first obs. used      1960-09-24  
   last obs. used      2020-01-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57649  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-29 00:51:49  

Additional Information
 Jupiter MOID = 1.48901 au 
 T_jup = 3.182 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.509885467684532E-15 -4.81497757118499E-15 -1.531094196953889E-12 -3.605220655419815E-15 -2.478050040675136E-13 3.961553403285256E-16
q -4.81497757118499E-15 1.582292210739586E-14 6.555140787225406E-12 1.071413129769498E-14 1.016132754060214E-12 -1.512499287404309E-15
tp -1.531094196953889E-12 6.555140787225406E-12 2.847808084729397E-8 2.10535646785529E-11 4.413000652592838E-9 6.006391838012078E-13
node -3.605220655419815E-15 1.071413129769498E-14 2.10535646785529E-11 6.029614022806667E-8 -6.028444380906017E-8 7.119087520637795E-12
peri -2.478050040675136E-13 1.016132754060214E-12 4.413000652592838E-9 -6.028444380906017E-8 6.097653158503583E-8 -6.981349663026668E-12
i 3.961553403285256E-16 -1.512499287404309E-15 6.006391838012078E-13 7.119087520637795E-12 -6.981349663026668E-12 2.729589512200216E-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 14.4   n/a MPO257001  
diameter diameter 6.828 km 0.220 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.072   0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18717 (1998 HZ127)          Discovered 1998-Apr-18 by LINEAR at Socorro
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1998 HZ127 = 1988 RJ10 
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-21 05:31 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin