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 ]  
40018 (1998 HH134)
Classification: Main-belt Asteroid          SPK-ID: 2040018
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 .08206394505810563 3.1352e-08  
a 2.384648753664886 1.0048e-08 au
q 2.188955069361251 7.5872e-08 au
i 6.03888422728022 4.1594e-06 deg
node 125.2967093047312 3.5322e-05 deg
peri 318.123318956779 4.5652e-05 deg
M 105.3758240541444 2.7363e-05 deg
tp 2458606.792635877063
(2019-May-03.29263588)
0.00010236 TDB
period 1345.039551115927
3.68
8.5009e-06
2.327e-08
d
yr
n .2676501220364278 1.6916e-09 deg/d
Q 2.580342437968521 1.0872e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1309  
   data-arc span      8065 days (22.08 yr)  
   first obs. used      1997-12-08  
   last obs. used      2020-01-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55603  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-29 05:54:52  

Additional Information
 Earth MOID = 1.20938 au 
 Jupiter MOID = 2.56381 au 
 T_jup = 3.524 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456768.5 (2014-Apr-21.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08115093081188617 3.1389e-08  
q 2.191890425120387 7.5937e-08 au
tp 2457262.153197576664
(2015-Aug-27.65319758)
0.00010466 TDB
node 125.3424238148049 3.5297e-05 deg
peri 318.3313168628227 4.585e-05 deg
i 6.040094310102008 4.1608e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1309  
   data-arc span      8065 days (22.08 yr)  
   first obs. used      1997-12-08  
   last obs. used      2020-01-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55603  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-29 05:54:52  

Additional Information
 Jupiter MOID = 2.56381 au 
 T_jup = 3.524 
Orbit Covariance (6×6)
  e q tp node peri i
e 9.852912318118921E-16 -2.365985272950426E-15 4.521759064854104E-13 1.507829894818735E-16 1.152095054991841E-13 3.622822470790178E-16
q -2.365985272950426E-15 5.766462273909604E-15 -1.222798230340544E-12 3.181790369908688E-16 -3.251102902263806E-13 -6.340395077122816E-16
tp 4.521759064854104E-13 -1.222798230340544E-12 1.095327675203529E-8 -1.956277604712586E-11 3.072958220194052E-9 1.903554752412733E-12
node 1.507829894818735E-16 3.181790369908688E-16 -1.956277604712586E-11 1.24590053819225E-9 -1.243971064562555E-9 3.099044687038309E-11
peri 1.152095054991841E-13 -3.251102902263806E-13 3.072958220194052E-9 -1.243971064562555E-9 2.102210109236814E-9 -3.031932301913464E-11
i 3.622822470790178E-16 -6.340395077122816E-16 1.903554752412733E-12 3.099044687038309E-11 -3.031932301913464E-11 1.731189655960904E-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 14.8   n/a MPO263680  
diameter diameter 2.693 km 0.244 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.154   0.042 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

40018 (1998 HH134)          Discovered 1998-Apr-19 by LINEAR at Socorro
Reference: 20020526/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1998 HH134 = 1999 NK33 = 2000 WY48 
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-23 06:07 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin