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 ]  
37984 (1998 HA138)
Classification: Main-belt Asteroid          SPK-ID: 2037984
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1457928545286475 3.6728e-08  
a 2.791470255819962 1.7077e-08 au
q 2.384493838892156 1.0102e-07 au
i 9.384098640832585 4.9369e-06 deg
node 168.6147144431408 2.5667e-05 deg
peri 139.0462712903282 3.0881e-05 deg
M 180.3363017385271 1.7439e-05 deg
tp 2459850.669984813968
(2022-Sep-28.16998481)
8.492e-05 TDB
period 1703.522734390134
4.66
1.5632e-05
4.28e-08
d
yr
n .2113267951947122 1.9392e-09 deg/d
Q 3.198446672747768 1.9567e-08 au
  Orbit Determination Parameters
   # obs. used (total)      949  
   data-arc span      7977 days (21.84 yr)  
   first obs. used      1998-03-25  
   last obs. used      2020-01-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57961  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 04:41:57  

Additional Information
 Earth MOID = 1.37952 au 
 Jupiter MOID = 2.13223 au 
 T_jup = 3.294 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.8   n/a MPO452698  
diameter diameter 3.635 km 0.992 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.212   0.130 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

37984 (1998 HA138)          Discovered 1998-Apr-20 by LINEAR at Socorro
Reference: 20020328/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1998 HA138 = 1999 RJ128 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Mar-28 18:33 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin