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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 53 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06534086969915996 1.4844e-08  
a 3.209719677629736 1.2789e-08 au
q 2.999993802402901 4.9942e-08 au
i 3.80270877662621 1.103e-06 deg
node 340.2768689347729 7.8226e-06 deg
peri 90.92393838999638 2.389e-05 deg
M 5.292420599801083 2.2004e-05 deg
tp 2459365.621874044775
(2021-May-31.12187404)
0.00012843 TDB
period 2100.385850719981
5.75
1.2553e-05
3.437e-08
d
yr
n .1713970791969473 1.0243e-09 deg/d
Q 3.41944555285657 1.3624e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3526  
   data-arc span      38190 days (104.56 yr)  
   first obs. used      1916-09-03  
   last obs. used      2021-03-26  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .4114  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 11:37:16  

Additional Information
 Earth MOID = 2.01745 au 
 Jupiter MOID = 1.77168 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 9.15   n/a E2021B10 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. 2020-October); 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

[ 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
1951-Feb-18 00:33 00:01 Jupiter 1.93927007566359 1.93926974476596 1.93927040656145 4.02043375252739 3.91028640930279 2433695.523129053 1.19842791125388 49.9915793778567 11.7956809840639 80.7437063104872 6052688.25235221 T 53 CATAB v2.0g-lin.ifort 2021-Jul-08 11:38:09 2021-Jul-08 11:38
1962-Mar-24 11:06 < 00:01 Jupiter 1.88399440407454 1.88399410957292 1.88399469857615 3.62443845043421 3.4981962166167 2437747.962506592 0.997013950996024 23.9175785340589 11.3612832084514 83.0823340273151 5553981.14456062 T 53 CATAB v2.0g-lin.ifort 2021-Jul-08 11:38:09 2021-Jul-08 11:38
1973-May-06 12:28 < 00:01 Jupiter 1.86847890471905 1.8684786584418 1.86847915099618 3.28185235239125 3.1406863822495 2441809.019757510 0.789259652297004 9.44918496247831 7.44833893763739 -28.8344673553322 5595769.62177958 T 53 CATAB v2.0g-lin.ifort 2021-Jul-08 11:38:09 2021-Jul-08 11:38
1984-Jun-25 08:57 < 00:01 Jupiter 1.89496776273491 1.89496757031473 1.894967955155 3.04823052996032 2.89788526324233 2445876.872685336 0.583413400894964 13.2587733801696 6.29650617534593 77.5368666579118 7235069.08238707 T 53 CATAB v2.0g-lin.ifort 2021-Jul-08 11:38:09 2021-Jul-08 11:38
1995-Aug-20 21:00 < 00:01 Jupiter 1.94468561070856 1.94468545251202 1.94468576890511 2.95727125166723 2.80612511207446 2449950.374951686 0.390022149100077 12.8415271047266 4.25369379750668 71.7596436686194 9817139.75365411 T 53 CATAB v2.0g-lin.ifort 2021-Jul-08 11:38:09 2021-Jul-08 11:38
2118-Jan-07 12:00 00:02 Jupiter 1.99737612649201 1.99737561058499 1.9973766423996 4.23241125394686 4.13100106652741 2494649.999719099 1.69051031036683 65.7439008171137 9.64542676965726 71.5147515288613 7323736.28090576 T 53 CATAB v2.0g-lin.ifort 2021-Jul-08 11:38:09 2021-Jul-08 11:38
2129-Feb-03 20:17 00:02 Jupiter 1.9030870929105 1.90308660047131 1.90308758535055 3.81216100313559 3.69356402189627 2498695.345302735 1.80964038264688 78.7922077466093 11.0354878015767 77.4219474665695 6179969.76197474 T 53 CATAB v2.0g-lin.ifort 2021-Jul-08 11:38:09 2021-Jul-08 11:38
2140-Mar-12 07:16 00:02 Jupiter 1.8454574871683 1.84545713760786 1.84545783672894 3.4474924713596 3.31168391797104 2502749.803090688 1.91542107384146 51.8121021131068 10.2305381782254 82.0960208166369 6046272.60572491 T 53 CATAB v2.0g-lin.ifort 2021-Jul-08 11:38:09 2021-Jul-08 11:38
2151-Apr-28 07:48 00:02 Jupiter 1.83578874947315 1.83578852683712 1.83578897210917 3.1668374385364 3.0176266687368 2506813.825192783 2.0385167532554 12.2369718396405 6.88195145338358 -44.4197463839494 5324464.94197827 T 53 CATAB v2.0g-lin.ifort 2021-Jul-08 11:38:09 2021-Jul-08 11:38
2162-Jun-19 22:54 00:02 Jupiter 1.87300579747387 1.87300545896897 1.87300613597888 2.99712746547344 2.84223862700478 2510884.454172854 2.19661699339116 28.5854262609407 6.90636562931697 52.3394338771221 8228092.23297285 T 53 CATAB v2.0g-lin.ifort 2021-Jul-08 11:38:09 2021-Jul-08 11:38
2173-Aug-15 02:21 00:02 Jupiter 1.93902542344924 1.93902489611943 1.93902595077927 2.96711108521534 2.81604158676356 2514958.597569588 2.38679908304951 42.6283364422654 4.63988360400501 55.5488305509133 10742355.6557118 T 53 CATAB v2.0g-lin.ifort 2021-Jul-08 11:38:09 2021-Jul-08 11:38

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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