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
JPL Small-Body Database Browser
Search: [ help ]  
44158 (1998 HN128)
Classification: Main-belt Asteroid          SPK-ID: 2044158
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ hide orbit diagram ]

For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09509806436428794 3.0716e-08  
a 2.322638255248509 7.4679e-09 au
q 2.101759852955928 7.0735e-08 au
i 6.356875007111546 3.7606e-06 deg
node 136.9179650121444 2.86e-05 deg
peri 145.8505912411939 3.4942e-05 deg
M 62.06982835987653 1.9098e-05 deg
tp 2458977.580103458608
(2020-May-08.08010346)
6.8711e-05 TDB
period 1292.917426637796
3.54
6.2356e-06
1.707e-08
d
yr
n .2784400554768391 1.3429e-09 deg/d
Q 2.543516657541089 8.1781e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1335  
   data-arc span      8289 days (22.69 yr)  
   first obs. used      1998-02-28  
   last obs. used      2020-11-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49639  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 09:26:17  

Additional Information
 Earth MOID = 1.0869 au 
 Jupiter MOID = 2.57229 au 
 T_jup = 3.562 
[ show covariance matrix ]

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 15.41   n/a E2021B10  

44158 (1998 HN128)          Discovered 1998-Apr-19 by LINEAR at Socorro
Reference: 20020822/Numbers.arcLast Updated: 2004-04-19

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1945-Jul-09 14:06 00:05 Vesta 0.020253705589033 0.0202498349221782 0.0202575844813829 1.6534196232389 1.65341607013853 2431646.087754491 5.09463735233088 664.13999526656 29.1219857899094 -73.5371078947233 97411.2453093177 T 29 CATAB v2.0f-lin.ifort 2021-Apr-13 09:26:21 2021-Apr-13 09:26
2051-Apr-23 17:30 < 00:01 Pallas 0.031184659526014 0.0311834490620314 0.031185871713311 11.7369743550211 11.7369740938571 2470285.229035388 0.306327689678131 425.38717533525 30.0033684067534 -82.9071637123948 154234.840374786 T 29 CATAB v2.0f-lin.ifort 2021-Apr-13 09:26:21 2021-Apr-13 09:26
2090-Sep-07 01:11 00:08 Vesta 0.0235212823429585 0.0235175381658565 0.023525039292617 1.61143553989841 1.61143240068327 2484666.549255285 8.12249752713885 870.914726112904 27.9921550515223 78.2094509643306 119980.921748464 T 29 CATAB v2.0f-lin.ifort 2021-Apr-13 09:26:21 2021-Apr-13 09:26

Alternate Designations
 1998 HN128 = 1999 RU83 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Jun-23 10:24 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin