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 ]  
830 Petropolitana (A916 QE)
Classification: Outer Main-belt Asteroid          SPK-ID: 2000830
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 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06445262085473231 3.6711e-08  
a 3.210492647152376 1.6303e-08 au
q 3.003567981808557 1.2129e-07 au
i 3.801246099092476 4.9236e-06 deg
node 340.2923543608725 6.211e-05 deg
peri 90.451527410756 7.3259e-05 deg
M 229.2294541843824 4.0207e-05 deg
tp 2459363.743970153260
(2021-May-29.24397015)
0.00023598 TDB
period 2101.144623519335
5.75
1.6005e-05
4.382e-08
d
yr
n .1713351836757501 1.3051e-09 deg/d
Q 3.417417312496193 1.7354e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2835  
   data-arc span      37679 days (103.16 yr)  
   first obs. used      1916-09-03  
   last obs. used      2019-11-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44965  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 01:58:10  

Additional Information
 Earth MOID = 2.02094 au 
 Jupiter MOID = 1.77522 au 
 T_jup = 3.185 
[ 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 9.10   n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 12
diameter diameter 41.328 km 0.131 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 39.0 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Behrend, R. (2005) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Hanus, J.; Durech, J.; Oszkiewicz, D.A.; Behrend, R.; et al. (2016) Astron. Astrophys. 586, A108.]
geometric albedo albedo 0.215   0.019 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
B-V BV 0.899   0.010 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=5.04, mean=7.32, max.=9.59) deg.
U-B UB 0.500   0.020 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=9.59 deg.
Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 2 color indices; used ground-based radiometric albedo

830 Petropolitana (A916 QE)          Discovered 1916-Aug-25 by Neujmin, G. at Simeis
Independent discovery Sept. 3 by M. Wolf, Heidelberg, was announced first.
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 A916 QE = 1933 RK = 1949 KW 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin