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285 Regina (A889 PA)
Classification: Main-belt Asteroid          SPK-ID: 2000285
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 41 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2046158875941889 4.7655e-08  
a 3.085484446898355 1.295e-08 au
q 2.454145308138183 1.4816e-07 au
i 17.61645166731602 5.2729e-06 deg
node 311.2292912837079 1.3217e-05 deg
peri 14.22190651128042 1.5829e-05 deg
M 32.24730485892673 9.824e-06 deg
tp 2458823.173193922396
(2019-Dec-05.67319392)
5.3543e-05 TDB
period 1979.62745932443
5.42
1.2463e-05
3.412e-08
d
yr
n .1818523976843875 1.1449e-09 deg/d
Q 3.716823585658527 1.56e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2369  
   data-arc span      39833 days (109.06 yr)  
   first obs. used      1911-09-01  
   last obs. used      2020-09-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .41635  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Oct-22 15:25:41  

Additional Information
 Earth MOID = 1.445 au 
 Jupiter MOID = 1.63047 au 
 T_jup = 3.123 
[ 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 10.7   n/a MPO267706  
diameter diameter 47.156 km 0.310 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 9.542 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Pilcher, F.; Benishek, V. (2010) Minor Planet Bull. 37, 50.]
geometric albedo albedo 0.050   0.005 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

285 Regina (A889 PA)          Discovered 1889-Aug-03 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
1908-Aug-14 04:43 00:02 Jupiter 1.7101960693764 1.71019490792159 1.71019723083393 4.44937422722549 4.33663175544907 2418167.696503055 1.77594198126627 182.131314259681 46.0396514481666 78.1915838296469 3308913.82519199 T 41 CATAB v2.0f-lin.ifort 2020-Oct-22 15:26:25 2020-Oct-22 15:26
1918-Sep-12 18:53 00:02 Jupiter 1.98018030175541 1.98017865580945 1.98018194772725 4.09230685303387 3.98641129134135 2421849.286542017 1.97279984385142 386.846208563206 19.7740942010428 -77.6036430190053 3075154.66409253 T 41 CATAB v2.0f-lin.ifort 2020-Oct-22 15:26:25 2020-Oct-22 15:26
1968-Aug-13 15:58 < 00:01 Jupiter 1.9922327243982 1.99223177351785 1.99223367527866 4.09651002872888 3.99137439309575 2440082.165349363 0.902423299233389 150.208026988561 46.672667081282 -84.5738670118619 3090072.63707401 T 41 CATAB v2.0f-lin.ifort 2020-Oct-22 15:26:25 2020-Oct-22 15:26
1978-Sep-25 19:52 < 00:01 Jupiter 1.70245659502608 1.70245603784601 1.70245715221274 4.47415347645459 4.36153529958864 2443777.327606517 0.621459107829134 242.761206367523 17.2423770781917 -85.0215277754628 3318630.06804708 T 41 CATAB v2.0f-lin.ifort 2020-Oct-22 15:26:25 2020-Oct-22 15:26
2038-Sep-02 13:16 < 00:01 Jupiter 1.62727625406653 1.62727581638921 1.62727669174515 4.50506161277132 4.38800058471306 2465669.052434966 0.501371004452124 122.516817644073 15.8667128726049 -83.2389203428736 3403423.29837685 T 41 CATAB v2.0f-lin.ifort 2020-Oct-22 15:26:25 2020-Oct-22 15:26
2098-Aug-14 05:21 00:02 Jupiter 1.78217831335724 1.78217707382344 1.78217955289246 4.3238303606819 4.21247689001923 2487564.722921694 1.60762315707903 148.923942453596 52.510083698762 75.4147917221893 3157028.72496791 T 41 CATAB v2.0f-lin.ifort 2020-Oct-22 15:26:25 2020-Oct-22 15:26
2108-Sep-25 13:44 00:02 Jupiter 1.88502780313836 1.8850261159549 1.88502949037164 4.37179895377135 4.26777948329028 2491259.072417872 1.97856358238777 515.912866496405 20.1714539516508 -80.7343517174178 3225805.84661812 T 41 CATAB v2.0f-lin.ifort 2020-Oct-22 15:26:25 2020-Oct-22 15:26
2168-Sep-22 12:46 00:03 Jupiter 1.66075250553255 1.66075139533157 1.66075361579857 4.52905113661029 4.41500368594462 2513171.032078006 2.68882823872473 550.26912610149 13.1599262190114 -84.4215680035841 3280106.41724289 T 41 CATAB v2.0f-lin.ifort 2020-Oct-22 15:26:25 2020-Oct-22 15:26

Alternate Designations
 A889 PA = 1951 AC1 = A911 QJ 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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