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JPL Small-Body Database Browser
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285 Regina
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 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2046158879903065 5.1697e-08  
a 3.085484447175578 1.3735e-08 au
q 2.454145307136467 1.6198e-07 au
i 17.61645155251851 5.6177e-06 deg
node 311.2292912135594 1.3238e-05 deg
peri 14.22190615709473 1.5849e-05 deg
M 32.24730509643535 1.0048e-05 deg
tp 2458823.173192592446
(2019-Dec-05.67319259)
5.4701e-05 TDB
period 1979.627459591227
5.42
1.3218e-05
3.619e-08
d
yr
n .1818523976598791 1.2142e-09 deg/d
Q 3.716823587214688 1.6545e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2164  
   data-arc span      39557 days (108.30 yr)  
   first obs. used      1911-09-01  
   last obs. used      2019-12-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43196  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 15:23:10  

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          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 1.7101960628186 1.71019488729848 1.71019723834203 4.44937418296815 4.33663170960321 2418167.696501327 1.86687352632446 199.323081981094 46.6877732777605 79.1350584842581 3106069.11447342 T 38 CATAB v2.0f-lin.ifort 2020-Feb-22 15:23:29 2020-Feb-22 15:23
1918-Sep-12 18:53 00:02 Jupiter 1.98018030325427 1.98017856818392 1.98018203835332 4.09230686895272 3.9864113077643 2421849.286543665 2.07368039081781 406.942830407345 20.6331298060405 -77.5961038919079 2884753.19530364 T 38 CATAB v2.0f-lin.ifort 2020-Feb-22 15:23:29 2020-Feb-22 15:23
1968-Aug-13 15:58 < 00:01 Jupiter 1.99223272294518 1.99223175956346 1.99223368632702 4.09650999091897 3.99137435421221 2440082.165349953 0.943106074033453 159.360061923833 48.1746197210307 -86.1311150285007 2901534.66453096 T 38 CATAB v2.0f-lin.ifort 2020-Feb-22 15:23:29 2020-Feb-22 15:23
1978-Sep-25 19:52 < 00:01 Jupiter 1.70245659056575 1.70245599076229 1.70245719037714 4.47415345642789 4.36153527874598 2443777.327609041 0.649324653146262 262.478996422571 18.0255380279564 -84.9646583518368 3082862.02141601 T 38 CATAB v2.0f-lin.ifort 2020-Feb-22 15:23:29 2020-Feb-22 15:23
2038-Sep-02 13:16 < 00:01 Jupiter 1.62727625195683 1.62727577368785 1.62727673022692 4.5050615792778 4.38800055017222 2465669.052440114 0.534287292654094 124.836354745139 18.0868827433762 -83.1475859856613 3193450.31131322 T 38 CATAB v2.0f-lin.ifort 2020-Feb-22 15:23:29 2020-Feb-22 15:23
2098-Aug-14 05:21 00:02 Jupiter 1.78217832328876 1.78217695997095 1.78217968660779 4.32383021011396 4.21247673609988 2487564.722948642 1.71191972431149 151.213072676826 58.3400444116492 74.4603600380555 2945085.24866135 T 38 CATAB v2.0f-lin.ifort 2020-Feb-22 15:23:29 2020-Feb-22 15:23
2108-Sep-25 13:44 00:02 Jupiter 1.88502778325738 1.88502601685732 1.88502954971252 4.37179893927259 4.2677794673277 2491259.072429927 2.10194475093973 542.561871409289 21.225507798981 -80.7639530608894 3040429.78462625 T 38 CATAB v2.0f-lin.ifort 2020-Feb-22 15:23:29 2020-Feb-22 15:23
2168-Sep-22 12:46 00:03 Jupiter 1.66075249227467 1.66075136064322 1.66075362397636 4.52905110632113 4.41500365395083 2513171.032094726 2.84902696544246 573.439048653319 13.9266149487315 -84.547561210803 3087964.10731344 T 38 CATAB v2.0f-lin.ifort 2020-Feb-22 15:23:29 2020-Feb-22 15:23

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