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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 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .204615869033506 5.184e-08  
a 3.085484448493808 1.3794e-08 au
q 2.45414536667588 1.6236e-07 au
i 17.61645000804488 5.6364e-06 deg
node 311.2292718207734 1.3276e-05 deg
peri 14.22192216516897 1.5891e-05 deg
M 32.24730526111941 1.0111e-05 deg
tp 2458823.173191573213
(2019-Dec-05.67319157)
5.5043e-05 TDB
period 1979.62746085988
5.42
1.3275e-05
3.634e-08
d
yr
n .1818523975433382 1.2194e-09 deg/d
Q 3.716823530311737 1.6616e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2139  
   data-arc span      39541 days (108.26 yr)  
   first obs. used      1911-09-01  
   last obs. used      2019-12-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43536  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-13 20:40:37  

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 1.71019617408445 1.71019499136385 1.71019735680826 4.44937397771025 4.33663150643948 2418167.696416887 1.87431075029125 199.813684541528 46.9647895603783 79.0902917433895 3097446.5670286 T 37 CATAB v2.0f-lin.ifort 2019-Dec-13 20:40:48 2019-Dec-13 20:40
1918-Sep-12 18:53 00:02 Jupiter 1.98018016150194 1.9801784189388 1.98018190409411 4.09230722355712 3.98641166410718 2421849.286478520 2.08203370250459 408.479888153331 20.6854189250023 -77.5877188348382 2878509.85897836 T 37 CATAB v2.0f-lin.ifort 2019-Dec-13 20:40:48 2019-Dec-13 20:40
1968-Aug-13 15:58 < 00:01 Jupiter 1.99223291527376 1.99223194666284 1.99223388388479 4.09650928955004 3.99137364465211 2440082.165347283 0.946710901532307 159.996477672787 48.3962896090807 -86.0541678175917 2892521.62920542 T 37 CATAB v2.0f-lin.ifort 2019-Dec-13 20:40:48 2019-Dec-13 20:40
1978-Sep-25 19:52 < 00:01 Jupiter 1.70245651217128 1.70245591147976 1.70245711287084 4.47415349855257 4.36153531670557 2443777.327569250 0.651536932801421 263.041502656021 18.0856446880973 -84.9740616607471 3075968.0748688 T 37 CATAB v2.0f-lin.ifort 2019-Dec-13 20:40:48 2019-Dec-13 20:40
2038-Sep-02 13:16 < 00:01 Jupiter 1.62727633117663 1.62727585197402 1.62727681038034 4.50506139809307 4.38800036992877 2465669.052446393 0.536561014207791 125.357225582189 18.1005208597193 -83.148265209774 3185190.6838782 T 37 CATAB v2.0f-lin.ifort 2019-Dec-13 20:40:48 2019-Dec-13 20:40
2098-Aug-14 05:21 00:02 Jupiter 1.78217859569468 1.78217722967586 1.7821799617148 4.32382975194681 4.21247628306679 2487564.723003419 1.71889030064649 152.040551766791 58.4414884688793 74.5081609221484 2937481.66455684 T 37 CATAB v2.0f-lin.ifort 2019-Dec-13 20:40:48 2019-Dec-13 20:40
2108-Sep-25 13:44 00:02 Jupiter 1.88502749615491 1.88502572333535 1.88502926902997 4.37179931873006 4.26777983999783 2491259.072508834 2.11057715398235 544.790714980548 21.2972541710272 -80.7685502349011 3032841.071174 T 37 CATAB v2.0f-lin.ifort 2019-Dec-13 20:40:48 2019-Dec-13 20:40
2168-Sep-22 12:46 00:03 Jupiter 1.6607523976923 1.66075126092124 1.66075353453425 4.52905105388002 4.41500359357601 2513171.032180199 2.86048041571497 575.885701992934 13.9591827209123 -84.5456103011444 3078708.50026909 T 37 CATAB v2.0f-lin.ifort 2019-Dec-13 20:40:48 2019-Dec-13 20:40

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