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JPL Small-Body Database Browser
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312 Pierretta
Classification: Main-belt Asteroid          SPK-ID: 2000312
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 46 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1598175307180299 3.5326e-08  
a 2.782272754832855 1.0126e-08 au
q 2.337616793371418 9.955e-08 au
i 9.029343774930576 4.3126e-06 deg
node 6.254765205059294 2.603e-05 deg
peri 262.7641295717945 2.9859e-05 deg
M 339.6931974655146 1.694e-05 deg
tp 2459096.117421129249
(2020-Sep-03.61742113)
7.994e-05 TDB
period 1695.110372402209
4.64
9.2535e-06
2.533e-08
d
yr
n .2123755513865623 1.1593e-09 deg/d
Q 3.226928716294292 1.1744e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2581  
   data-arc span      46908 days (128.43 yr)  
   first obs. used      1891-08-29  
   last obs. used      2020-02-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43799  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 15:23:57  

Additional Information
 Earth MOID = 1.34329 au 
 Jupiter MOID = 1.95843 au 
 T_jup = 3.296 
[ 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 8.8   n/a MPO473765 IRAS observations used: 27
diameter diameter 46.191 km 0.411 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 10.282 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Mohamed, R.A.; Chiorny, V.G.; Dovgopol, A.N.; Shevchenko, V.G. (1994) Astron. Astrophys. Suppl. Ser. 108, 69-72.]
[Behrend, R. (2004) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Durech, J.; Kaasalainen, M.; Warner, B.D.; Fauerbach, M.; et al. (2009) Astron. Astrophys. 493, 291-297.]
[Hanus, J.; Durech, J.; Broz, M.; Warner, B.D.; et al. (2011) Astron. Astrophys. 530, A134.]
geometric albedo albedo 0.230   0.051 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
B-V BV 0.843   0.076 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=9.52, mean=9.64, max.=9.76) deg.
U-B UB 0.429   0.035 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=9.52, mean=9.64, max.=9.76) 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
SMASSII spectral type spec_B Sk   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

312 Pierretta          Discovered 1891-Aug-28 by Charlois, A. at Nice
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
1929-Nov-05 22:12 00:01 Jupiter 1.94546995099435 1.94546953704686 1.94547036494217 2.12824196991756 1.91275977770936 2425921.425262164 1.34727155641436 68.6512407018202 23.5841716139425 -59.8186281945644 2093111.56715528 T 46 CATAB v2.0f-lin.ifort 2020-Feb-22 15:24:13 2020-Feb-22 15:24
1952-Aug-08 00:58 < 00:01 Jupiter 1.97526569215914 1.97526526009034 1.97526612422861 3.24500273542372 3.11005045102635 2434232.540359204 0.906049791879101 80.8494811605561 10.1590282006551 -81.8380047364491 2615708.47149408 T 46 CATAB v2.0f-lin.ifort 2020-Feb-22 15:24:13 2020-Feb-22 15:24
2036-Jul-30 21:29 < 00:01 Jupiter 1.95285415815684 1.95285376425921 1.95285455205469 2.13812571755351 1.92460651426081 2464905.394837927 0.491511291645307 58.9254239807894 12.7122171999287 -69.4925514131564 2613616.87972097 T 46 CATAB v2.0f-lin.ifort 2020-Feb-22 15:24:13 2020-Feb-22 15:24
2059-Apr-30 18:56 < 00:01 Jupiter 1.99477287947675 1.99477245156184 1.99477330739211 3.31773122560597 3.18717718745732 2473214.289158070 0.839443167930091 76.711793952859 10.7793998426268 -81.3131358919698 2841914.71749914 T 46 CATAB v2.0f-lin.ifort 2020-Feb-22 15:24:13 2020-Feb-22 15:24
2143-Apr-25 20:12 00:02 Jupiter 1.95620538648122 1.95620497401186 1.95620579895103 2.14289239020917 1.93028560977498 2503889.341529339 2.27264916946236 73.1949149042444 29.9662145422746 -50.1819571208534 1657949.69974577 T 46 CATAB v2.0f-lin.ifort 2020-Feb-22 15:24:13 2020-Feb-22 15:24
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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