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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 48 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2046300276447057 2.4775e-08  
a 3.086076317875283 1.1208e-08 au
q 2.454572435634792 7.487e-08 au
i 17.61641002428757 3.7833e-07 deg
node 311.2287407387236 1.2245e-06 deg
peri 14.27964063782225 3.9553e-06 deg
M 68.56404541259356 3.5064e-06 deg
tp 2458823.360211854497
(2019-Dec-05.86021185)
1.7767e-05 TDB
period 1980.197097696969
5.42
1.0787e-05
2.953e-08
d
yr
n .1818000846575784 9.9038e-10 deg/d
Q 3.717580200115774 1.3501e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2876  
   data-arc span      40000 days (109.51 yr)  
   first obs. used      1911-09-01  
   last obs. used      2021-03-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .38821  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 10:38:15  

Additional Information
 Earth MOID = 1.44351 au 
 Jupiter MOID = 1.63005 au 
 T_jup = 3.123 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456924.5 (2014-Sep-24.0) TDB
Reference: JPL 48 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .207243708458339 2.4458e-08  
q 2.445361739983933 7.3909e-08 au
tp 2456846.539315709132
(2014-Jul-08.03931571)
1.2381e-05 TDB
node 311.3877628906018 1.2232e-06 deg
peri 14.54449655812346 3.9117e-06 deg
i 17.6192435812137 3.776e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      2876  
   data-arc span      40000 days (109.51 yr)  
   first obs. used      1911-09-01  
   last obs. used      2021-03-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .38821  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 10:38:15  

Additional Information
 Jupiter MOID = 1.63005 au 
 T_jup = 3.123 
Orbit Covariance (6×6)
  e q tp node peri i
e 5.982113036455222E-16 -1.79527637353654E-15 -7.085648927435101E-14 4.131665222267265E-15 -6.813970092394924E-14 -1.487260679715958E-15
q -1.79527637353654E-15 5.462599656272079E-15 2.358560930159019E-13 -1.251939601613837E-14 2.119078649302123E-13 4.52033512299778E-15
tp -7.085648927435101E-14 2.358560930159019E-13 1.532796952319368E-10 -5.912774196492645E-13 3.636053043341876E-11 -4.289962399378484E-13
node 4.131665222267265E-15 -1.251939601613837E-14 -5.912774196492645E-13 1.496105113412963E-12 -2.000898030108303E-12 -3.258456729605987E-13
peri -6.813970092394924E-14 2.119078649302123E-13 3.636053043341876E-11 -2.000898030108303E-12 1.530138797939527E-11 3.432132844510594E-13
i -1.487260679715958E-15 4.52033512299778E-15 -4.289962399378484E-13 -3.258456729605987E-13 3.432132844510594E-13 1.425833692244151E-13

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 10.85   n/a E2021B10  
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. 2020-October); 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 1.71019620177113 1.71019516852729 1.71019723501759 4.44937249000606 4.33662998253824 2418167.696477017 1.57562515139747 134.909936639189 25.0921009185703 69.9115094135682 8092986.28630163 T 48 CATAB v2.0f-lin.ifort 2021-Apr-12 10:39:57 2021-Apr-12 10:39
1918-Sep-12 18:52 00:02 Jupiter 1.98018009088795 1.98017871703914 1.98018146475782 4.09230613919998 3.98641054771136 2421849.286451532 1.74585000556701 334.688732401694 4.92711458297706 -77.6113282702715 13685469.2091116 T 48 CATAB v2.0f-lin.ifort 2021-Apr-12 10:39:57 2021-Apr-12 10:39
1968-Aug-13 15:58 < 00:01 Jupiter 1.99223273240938 1.99223197140145 1.99223349341742 4.09650782995339 3.99137213741971 2440082.165349478 0.796826161629554 57.9337881160129 35.3428168508362 -68.1979950244386 24929842.5789274 T 48 CATAB v2.0f-lin.ifort 2021-Apr-12 10:39:57 2021-Apr-12 10:39
1978-Sep-25 19:52 < 00:01 Jupiter 1.70245658312822 1.70245623055365 1.70245693570773 4.47415213419406 4.36153392250287 2443777.327504069 0.541809323806676 152.321003801761 3.54523843372383 -83.5606128344482 15431549.8543392 T 48 CATAB v2.0f-lin.ifort 2021-Apr-12 10:39:57 2021-Apr-12 10:39
2038-Sep-02 13:15 < 00:01 Jupiter 1.6272763419608 1.62727610596601 1.62727657795672 4.50506008656823 4.3879990248571 2465669.052331960 0.389750943162533 83.4104979800802 6.37307168485897 -83.6368024192965 20005757.5961382 T 48 CATAB v2.0f-lin.ifort 2021-Apr-12 10:39:57 2021-Apr-12 10:39
2098-Aug-14 05:21 00:01 Jupiter 1.78217823568034 1.78217734605665 1.78217912530625 4.32382863004781 4.21247510934294 2487564.722790569 1.3552730627905 123.074206697497 21.7124758548099 70.6024335323466 12147973.6428557 T 48 CATAB v2.0f-lin.ifort 2021-Apr-12 10:39:57 2021-Apr-12 10:39
2108-Sep-25 13:44 00:02 Jupiter 1.88502788560904 1.88502648047861 1.88502929077816 4.37179773423164 4.26777823921447 2491259.072191835 1.68390004555803 436.938282519953 2.81022955739127 -80.6244996419713 15784416.31616 T 48 CATAB v2.0f-lin.ifort 2021-Apr-12 10:39:57 2021-Apr-12 10:39
2168-Sep-22 12:46 00:02 Jupiter 1.66075249577336 1.66075151057176 1.66075348102781 4.52904975715323 4.41500227081303 2513171.032154944 2.31877040890614 479.369862799017 5.69194842470913 -84.1949534642771 15116556.6737189 T 48 CATAB v2.0f-lin.ifort 2021-Apr-12 10:39:57 2021-Apr-12 10:39

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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