+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   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 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 50 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .06511324328435078 3.5656e-08   a 3.208944400574333 1.3951e-08 au q 2.999999623133781 1.196e-07 au i 3.802737401891188 4.4771e-06 deg node 340.2783717927246 5.8538e-05 deg peri 90.93401901854298 6.8135e-05 deg M 331.6769166868014 3.4619e-05 deg tp 2459365.688475271341 (2021-May-31.18847527) 0.00020194 TDB period 2099.62490453752 5.75 1.3693e-05 3.749e-08 d yr n .1714591969365578 1.1182e-09 deg/d Q 3.417889178014885 1.486e-08 au   Orbit Determination Parameters    # obs. used (total)      3453      data-arc span      38130 days (104.39 yr)      first obs. used      1916-09-03      last obs. used      2021-01-25      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .41417      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 00:50:11   Additional Information  Earth MOID = 2.01716 au   Jupiter MOID = 1.77274 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.DB Last 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 00:34 00:01 Jupiter 1.93927011865595 1.93926957762576 1.93927065968648 4.02043413907985 3.91028680860313 2433695.523270342 1.45419168394214 73.5413092021004 18.6393956917509 78.8824386397133 3743289.95620866 T 50 CATAB v2.0f-lin.ifort 2021-Feb-24 00:50:20 2021-Feb-24 00:50 1962-Mar-24 11:06 00:01 Jupiter 1.88399432965305 1.8839939070701 1.8839947522361 3.62443859714693 3.49819636283718 2437747.962643903 1.19162963359499 52.4609447440623 15.7714022836882 83.7521517296421 3455862.93548329 T 50 CATAB v2.0f-lin.ifort 2021-Feb-24 00:50:20 2021-Feb-24 00:50 1973-May-06 12:29 < 00:01 Jupiter 1.86847876508249 1.86847841693984 1.86847911322515 3.28185213722312 3.14068614582592 2441809.019868061 0.925299295913502 44.598859941881 12.5735053525525 85.6238059690775 3773903.53908134 T 50 CATAB v2.0f-lin.ifort 2021-Feb-24 00:50:20 2021-Feb-24 00:50 1984-Jun-25 08:57 < 00:01 Jupiter 1.89496760447344 1.8949672583362 1.89496795061068 3.04822997378219 2.89788466447493 2445876.872777511 0.669314941654389 45.2574628943524 11.2876344388855 81.5122685879845 4203079.97283121 T 50 CATAB v2.0f-lin.ifort 2021-Feb-24 00:50:20 2021-Feb-24 00:50 1995-Aug-20 21:00 < 00:01 Jupiter 1.94468548376205 1.94468511321368 1.94468585431042 2.95727046680374 2.80612427394609 2449950.374997761 0.434787142158623 42.702717949801 10.9399417636176 78.6095850394079 4184001.60906631 T 50 CATAB v2.0f-lin.ifort 2021-Feb-24 00:50:20 2021-Feb-24 00:50 2118-Jan-07 11:59 00:02 Jupiter 1.99737616317666 1.99737562327434 1.99737670307943 4.23241141690877 4.13100123480811 2494649.999480931 2.09075644079283 83.4709545705487 19.4829758441381 80.2364173434279 4017147.48293312 T 50 CATAB v2.0f-lin.ifort 2021-Feb-24 00:50:20 2021-Feb-24 00:50 2129-Feb-03 20:17 00:02 Jupiter 1.90308702760028 1.90308649853156 1.90308755666959 3.81216081660503 3.69356382457534 2498695.344985505 2.25338859558984 100.224752472886 18.0236673850525 82.8438620326731 3620194.08505679 T 50 CATAB v2.0f-lin.ifort 2021-Feb-24 00:50:20 2021-Feb-24 00:50 2140-Mar-12 07:16 00:02 Jupiter 1.84545735383017 1.84545693628921 1.84545777137124 3.44749204494049 3.31168346328566 2502749.802708120 2.40120515388089 73.4809178299463 14.7417818020395 86.5392313534056 3320171.42363005 T 50 CATAB v2.0f-lin.ifort 2021-Feb-24 00:50:20 2021-Feb-24 00:50 2151-Apr-28 07:48 00:03 Jupiter 1.83578862184722 1.83578829149542 1.83578895219901 3.1668368033855 3.01762599070556 2506813.824758587 2.56282041024246 45.2203525044028 14.3453796534939 87.2361953026244 3158900.63105594 T 50 CATAB v2.0f-lin.ifort 2021-Feb-24 00:50:20 2021-Feb-24 00:50 2162-Jun-19 22:53 00:03 Jupiter 1.87300572913407 1.873005314323 1.87300614394525 2.99712669351136 2.84223780629 2510884.453681214 2.75453009790697 55.1837074424367 15.8036339006324 73.0934898450663 4126730.29881576 T 50 CATAB v2.0f-lin.ifort 2021-Feb-24 00:50:20 2021-Feb-24 00:50 2173-Aug-15 02:20 00:03 Jupiter 1.93902543766153 1.93902486667192 1.93902600865148 2.96711038336185 2.81604084753844 2514958.597004815 2.97555757960708 65.2220332365631 14.6302954358984 68.5853411107768 4579963.21426168 T 50 CATAB v2.0f-lin.ifort 2021-Feb-24 00:50:20 2021-Feb-24 00:50 Alternate Designations  A917 YD = 1933 RK = 1949 KW = A916 QE  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Mar-09 05:00 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin