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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 45 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1598175298488088 3.5417e-08  
a 2.782272754398134 1.02e-08 au
q 2.337616795424583 9.9733e-08 au
i 9.029343761446224 4.3163e-06 deg
node 6.254765378305252 2.613e-05 deg
peri 262.7641288175545 2.9993e-05 deg
M 339.6931983687437 1.714e-05 deg
tp 2459096.117416853859
(2020-Sep-03.61741685)
8.0889e-05 TDB
period 1695.110372004926
4.64
9.3217e-06
2.552e-08
d
yr
n .2123755514363367 1.1679e-09 deg/d
Q 3.226928713371685 1.183e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2553  
   data-arc span      46882 days (128.36 yr)  
   first obs. used      1891-08-29  
   last obs. used      2020-01-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44022  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-28 17:22:46  

Additional Information
 Earth MOID = 1.34329 au 
 Jupiter MOID = 1.95843 au 
 T_jup = 3.296 
[ hide covariance matrix ]
Orbital Elements at Epoch 2455232.5 (2010-Feb-05.0) TDB
Reference: JPL 45 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1607621575805056 3.5524e-08  
q 2.334749480215493 1.0028e-07 au
tp 2455694.677721769916
(2011-May-13.17772177)
7.4433e-05 TDB
node 6.71384091825944 2.6125e-05 deg
peri 260.4538093441452 2.9899e-05 deg
i 9.033707930698625 4.3144e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2553  
   data-arc span      46882 days (128.36 yr)  
   first obs. used      1891-08-29  
   last obs. used      2020-01-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44022  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-28 17:22:46  

Additional Information
 Jupiter MOID = 1.95843 au 
 T_jup = 3.296 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.261981952936978E-15 -3.54866423086509E-15 2.092695132869847E-13 -3.764165479864126E-15 4.677167534367297E-14 1.067286968975574E-15
q -3.54866423086509E-15 1.005521463117928E-14 -4.303235808325117E-13 8.958883494773676E-15 -1.049931345366682E-13 -2.436862840765604E-15
tp 2.092695132869847E-13 -4.303235808325117E-13 5.540259356885328E-9 -5.891228162105691E-12 1.104781022661501E-9 1.209600934098304E-12
node -3.764165479864126E-15 8.958883494773676E-15 -5.891228162105691E-12 6.825064602926201E-10 -6.743446361587431E-10 -1.003468267543494E-11
peri 4.677167534367297E-14 -1.049931345366682E-13 1.104781022661501E-9 -6.743446361587431E-10 8.939608519196539E-10 1.004603014720756E-11
i 1.067286968975574E-15 -2.436862840765604E-15 1.209600934098304E-12 -1.003468267543494E-11 1.004603014720756E-11 1.861405907677582E-11

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

[ 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
1929-Nov-05 22:12 00:01 Jupiter 1.94546995337336 1.94546953790994 1.94547036883712 2.12824195589169 1.91275976238174 2425921.425273510 1.35733512605064 69.0242359953487 23.666131227845 -59.7676632818181 2090961.94748563 T 45 CATAB v2.0f-lin.ifort 2020-Jan-28 17:22:59 2020-Jan-28 17:23
1952-Aug-08 00:58 < 00:01 Jupiter 1.97526568619156 1.97526525129732 1.97526612108647 3.24500271321959 3.11005042744216 2434232.540366271 0.912826042166901 81.4378825697257 10.1599264912628 -81.8314462941189 2609187.43663676 T 45 CATAB v2.0f-lin.ifort 2020-Jan-28 17:22:59 2020-Jan-28 17:23
2036-Jul-30 21:29 < 00:01 Jupiter 1.9528541577756 1.95285376328752 1.95285455226389 2.13812571742156 1.92460651407022 2464905.394835422 0.494981532925007 59.1806462592421 12.7410151031888 -69.4699284642689 2610504.0010977 T 45 CATAB v2.0f-lin.ifort 2020-Jan-28 17:22:59 2020-Jan-28 17:23
2059-Apr-30 18:56 < 00:01 Jupiter 1.99477287919173 1.9947724509463 1.99477330743774 3.31773121238595 3.18717717367675 2473214.289152338 0.845649138638283 76.9872739116448 10.8126628873732 -81.3452196404156 2839919.01405558 T 45 CATAB v2.0f-lin.ifort 2020-Jan-28 17:22:59 2020-Jan-28 17:23
2143-Apr-25 20:12 00:02 Jupiter 1.95620538438997 1.95620497122618 1.95620579755409 2.14289249630976 1.93028572732196 2503889.341499541 2.290112959109 73.6382517390351 30.1273007968726 -50.0781328613544 1649480.80091725 T 45 CATAB v2.0f-lin.ifort 2020-Jan-28 17:22:59 2020-Jan-28 17:23
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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