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312 Pierretta (A891 QA)
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 47 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1598175339799815 3.4948e-08  
a 2.782272756747379 9.5703e-09 au
q 2.337616785904328 9.8873e-08 au
i 9.029343581778962 4.2453e-06 deg
node 6.254767001750479 2.5422e-05 deg
peri 262.7641305532934 2.8936e-05 deg
M 339.6931932668091 1.5276e-05 deg
tp 2459096.117440998135
(2020-Sep-03.61744100)
7.2042e-05 TDB
period 1695.110374151856
4.64
8.7461e-06
2.395e-08
d
yr
n .212375551167354 1.0958e-09 deg/d
Q 3.22692872759043 1.11e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2700  
   data-arc span      46994 days (128.66 yr)  
   first obs. used      1891-08-29  
   last obs. used      2020-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4299  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 01:03:06  

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 (A891 QA)          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 1.94546993199125 1.94546952841275 1.94547033556998 2.12824212691852 1.91275995017391 2425921.425199437 1.27081233039454 66.054103422787 22.7748177306232 -60.2433452001001 2122564.81995088 T 47 CATAB v2.0f-lin.ifort 2020-May-20 01:03:19 2020-May-20 01:03
1952-Aug-08 00:58 < 00:01 Jupiter 1.97526571306671 1.97526530653068 1.97526611960329 3.24500289416285 3.11005061811295 2434232.540322826 0.854776288963862 76.4324336423421 10.1216508245949 -81.9446805695469 2673400.95564531 T 47 CATAB v2.0f-lin.ifort 2020-May-20 01:03:19 2020-May-20 01:03
2036-Jul-30 21:29 < 00:01 Jupiter 1.95285415281273 1.95285376510484 1.95285454052083 2.13812568790335 1.92460648070449 2464905.394858436 0.466005479299806 56.991290846225 12.5861088444736 -69.57892461425 2623438.81007582 T 47 CATAB v2.0f-lin.ifort 2020-May-20 01:03:19 2020-May-20 01:03
2059-Apr-30 18:56 < 00:01 Jupiter 1.99477287521227 1.99477244978808 1.99477330063691 3.31773110536096 3.18717706200198 2473214.289197108 0.792731455181007 74.7334456337757 10.4141809743423 -80.9860266044622 2846985.08916054 T 47 CATAB v2.0f-lin.ifort 2020-May-20 01:03:19 2020-May-20 01:03
2143-Apr-25 20:12 00:02 Jupiter 1.95620538742698 1.95620498311361 1.95620579174068 2.14289223774116 1.93028544062218 2503889.341620869 2.14149383129876 69.7741685938224 28.8757996578342 -50.8458827608895 1711885.89119932 T 47 CATAB v2.0f-lin.ifort 2020-May-20 01:03:19 2020-May-20 01:03
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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