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830 Petropolitana (A917 YD)
Classification: Outer Main-belt Asteroid          SPK-ID: 2000830
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbit Diagram
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Note: This Java-based orbit viewer will eventually be retired.

Note: Make sure you have Java enabled on your browser to see the applet. This applet is provided as a 3D orbit visualization tool. The applet 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. For accurate long-term ephemerides, please instead use our Horizons system.

Note: If the applet is not working, here are some notes that might help.
Orbit Viewer

Additional Notes: the orbits shown in the applet are color coded. The planets are white lines, and the asteroid/comet is a blue line. The bright white line indicates the portion of the orbit that is above the ecliptic plane, and the darker portion is below the ecliptic plane. Likewise for the asteroid/comet orbit, the light blue indicates the portion above the ecliptic plane, and the dark blue the portion below the ecliptic plane.

Orbit Viewer applet originally written and kindly provided by Osamu Ajiki (AstroArts), and further modified by Ron Baalke (JPL).


Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 46 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06493631329158965 3.5798e-08  
a 3.208512776057954 1.4448e-08 au
q 3.000163785231786 1.1977e-07 au
i 3.80280039236222 4.6898e-06 deg
node 340.2792890044897 5.8976e-05 deg
peri 90.93997921399747 6.9049e-05 deg
M 297.3602577869424 3.6127e-05 deg
tp 2459365.759522729822
(2021-May-31.25952273)
0.0002109 TDB
period 2099.20129836239
5.75
1.418e-05
3.882e-08
d
yr
n .171493796369524 1.1584e-09 deg/d
Q 3.416861766884121 1.5387e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3264  
   data-arc span      38039 days (104.15 yr)  
   first obs. used      1916-09-03  
   last obs. used      2020-10-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .41982  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:25:21  

Additional Information
 Earth MOID = 2.01786 au 
 Jupiter MOID = 1.77375 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-August); 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 (A917 YD)          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

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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
1951-Feb-18 00:33 00:02 Jupiter 1.93927005992097 1.93926950146753 1.93927061837474 4.02043378647786 3.91028644268579 2433695.523172782 1.51365109718479 75.7850597483309 18.8665290001558 78.5107163660714 3649583.37308456 T 46 CATAB v2.0f-lin.ifort 2020-Nov-13 04:25:29 2020-Nov-13 04:25
1962-Mar-24 11:06 00:01 Jupiter 1.88399428133888 1.8839938419454 1.88399472073237 3.62443812569475 3.49819587107549 2437747.962545121 1.24061084534645 53.4323352724002 16.182741955753 83.0796275509223 3305939.46149588 T 46 CATAB v2.0f-lin.ifort 2020-Nov-13 04:25:29 2020-Nov-13 04:25
1973-May-06 12:29 < 00:01 Jupiter 1.8684787250309 1.86847836512659 1.86847908493521 3.28185176157259 3.14068575019688 2441809.019798206 0.962398897184872 44.6233491970614 12.8955825229738 85.612759398418 3582023.75242388 T 46 CATAB v2.0f-lin.ifort 2020-Nov-13 04:25:29 2020-Nov-13 04:25
1984-Jun-25 08:57 < 00:01 Jupiter 1.89496756886056 1.8949672161704 1.89496792155072 3.04822973229724 2.8978844075627 2445876.872730958 0.694144963860127 46.0521249134198 11.4549113254427 81.7531642723072 4055303.46597723 T 46 CATAB v2.0f-lin.ifort 2020-Nov-13 04:25:29 2020-Nov-13 04:25
1995-Aug-20 21:00 < 00:01 Jupiter 1.94468545217361 1.94468507709334 1.94468582725389 2.95727036175721 2.80612416072018 2449950.374964808 0.447778077526384 44.7002772585621 11.0218209691828 78.8755400626091 4143824.79939001 T 46 CATAB v2.0f-lin.ifort 2020-Nov-13 04:25:29 2020-Nov-13 04:25
2118-Jan-07 11:59 00:02 Jupiter 1.99737617369975 1.99737562875284 1.997376718647 4.23241141507592 4.1310012334711 2494649.999617771 2.15344609539917 86.4026067159099 19.6960206920368 80.5032355862128 3978207.01798323 T 46 CATAB v2.0f-lin.ifort 2020-Nov-13 04:25:29 2020-Nov-13 04:25
2129-Feb-03 20:17 00:02 Jupiter 1.90308702804797 1.90308649844502 1.90308755765158 3.81216075092838 3.69356375681821 2498695.345146299 2.32222752226459 103.660899760616 18.2124043336955 83.2313514458049 3535112.26472447 T 46 CATAB v2.0f-lin.ifort 2020-Nov-13 04:25:29 2020-Nov-13 04:25
2140-Mar-12 07:16 00:02 Jupiter 1.84545733274135 1.84545691223461 1.8454577532481 3.44749188382943 3.31168329398385 2502749.802874374 2.47714282271086 75.677587246067 15.1482019219681 87.1212557328703 3220914.5066979 T 46 CATAB v2.0f-lin.ifort 2020-Nov-13 04:25:29 2020-Nov-13 04:25
2151-Apr-28 07:48 00:03 Jupiter 1.8357885715487 1.8357882199591 1.8357889231382 3.16683663242656 3.01762580710403 2506813.824936836 2.64763771594107 45.3196369040933 15.5856421194828 87.5815048601735 3119123.89096775 T 46 CATAB v2.0f-lin.ifort 2020-Nov-13 04:25:29 2020-Nov-13 04:25
2162-Jun-19 22:54 00:03 Jupiter 1.87300565207304 1.87300520256064 1.87300610158565 2.99712654900557 2.84223764736308 2510884.453871294 2.84944932407213 56.2096005305926 16.9592917968655 72.2813477952959 3997157.14141948 T 46 CATAB v2.0f-lin.ifort 2020-Nov-13 04:25:29 2020-Nov-13 04:25
2173-Aug-15 02:20 00:03 Jupiter 1.93902534454926 1.93902473977501 1.93902594932396 2.96711025317889 2.8160407029227 2514958.597227385 3.08056865282899 67.5816143909539 15.4684239002487 68.282330046934 4432087.69649782 T 46 CATAB v2.0f-lin.ifort 2020-Nov-13 04:25:29 2020-Nov-13 04:25

Alternate Designations
 A917 YD = 1933 RK = 1949 KW = A916 QE 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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