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 ]  
790 Pretoria (A912 BE)
Classification: Outer Main-belt Asteroid          SPK-ID: 2000790
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.


[ revert to old Java-based viewer ]

Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 72 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1523475945041998 3.9259e-08  
a 3.408385001380195 1.8187e-08 au
q 2.889125745275728 1.3571e-07 au
i 20.5336974042691 4.2358e-06 deg
node 252.0352585762733 9.4961e-06 deg
peri 38.61967342634277 1.4774e-05 deg
M 243.6244716157639 1.408e-05 deg
tp 2459343.485879813543
(2021-May-08.98587981)
9.4372e-05 TDB
period 2298.377678249984
6.29
1.8396e-05
5.037e-08
d
yr
n .156632220808074 1.2537e-09 deg/d
Q 3.927644257484661 2.0957e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2427  
   data-arc span      37403 days (102.40 yr)  
   first obs. used      1916-12-14  
   last obs. used      2019-05-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .41757  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-29 19:13:48  

Additional Information
 Earth MOID = 1.89988 au 
 Jupiter MOID = 1.27479 au 
 T_jup = 3.025 
[ 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 8.00   n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 24
diameter diameter 170.37 km 2.6 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 24
rotation period rot_per 10.37 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Published Reference List:
[Schober, H.J.; Stanzel, R. (1979) Astron. Astrophys. Suppl. Ser. 38, 265-268.]
[Behrend, R. (2005) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Warner, B.D. (2005) Minor Planet Bull. 32, 54-58.]
[Behrend, R. (2009) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Warner, B.D. (2010) Minor Planet Bull. 37, 24-27.]
geometric albedo albedo 0.0384   0.001 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 24
B-V BV 0.706   0.035 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=3; phase (min.=6.21, mean=9.23, max.=11.25) deg.
U-B UB 0.309   0.049 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=3; phase (min.=6.21, mean=9.23, max.=11.25) deg.
Tholen spectral type spec_T P   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo

790 Pretoria (A912 BE)          Discovered 1912-Jan-16 by Wood, H. E. at Johannesburg (UO)
and K. Van der Spuy.
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 A912 BE = 1970 HN 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2019-Oct-19 16:18 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin