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 ]  
175758 (1998 SH21)
Classification: Main-belt Asteroid          SPK-ID: 2175758
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1615011570025971 4.4669e-08  
a 2.387766920322772 1.0642e-08 au
q 2.002139800038117 1.0513e-07 au
i 2.639048831032756 5.0946e-06 deg
node 28.19905340307443 8.6168e-05 deg
peri 191.3465163952321 8.7316e-05 deg
M 150.4627120287106 1.3805e-05 deg
tp 2458637.235074533167
(2019-Jun-02.73507453)
5.1103e-05 TDB
period 1347.678573873953
3.69
9.0096e-06
2.467e-08
d
yr
n .2671260098505286 1.7858e-09 deg/d
Q 2.773394040607428 1.2361e-08 au
  Orbit Determination Parameters
   # obs. used (total)      479  
   data-arc span      8121 days (22.23 yr)  
   first obs. used      1998-09-21  
   last obs. used      2020-12-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .57453  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 21:06:42  

Additional Information
 Earth MOID = .993304 au 
 Jupiter MOID = 2.19898 au 
 T_jup = 3.515 
[ 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 16.86   n/a E2021B55  

175758 (1998 SH21)          Discovered 1998-Sep-21 by Spacewatch at Kitt Peak
Reference: 20080221/Numbers.arcLast Updated: 2008-02-22

Alternate Designations
 1998 SH21 = 2004 CD78 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Apr-15 15:12 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin