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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 ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 47 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2046300277801769 2.4775e-08  
a 3.086076321100859 1.1209e-08 au
q 2.454572437782244 7.4871e-08 au
i 17.61641001936785 3.7834e-07 deg
node 311.2287407424386 1.2245e-06 deg
peri 14.27964071238509 3.9553e-06 deg
M 68.56404503662712 3.5067e-06 deg
tp 2458823.360213331237
(2019-Dec-05.86021333)
1.7768e-05 TDB
period 1980.197100801531
5.42
1.0789e-05
2.954e-08
d
yr
n .1818000843725514 9.9049e-10 deg/d
Q 3.717580204419475 1.3503e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2872  
   data-arc span      39996 days (109.50 yr)  
   first obs. used      1911-09-01  
   last obs. used      2021-03-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .3873  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Mar-16 10:56:21  

Additional Information
 Earth MOID = 1.44351 au 
 Jupiter MOID = 1.63005 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 10.85   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

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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 1.71019616281843 1.71019512957034 1.71019719606925 4.44937315948527 4.33663066619017 2418167.696469394 1.57566147237734 134.915730802574 25.0919247161803 69.9122650589544 8093069.17423719 T 47 CATAB v2.0f-lin.ifort 2021-Mar-16 10:57:57 2021-Mar-16 10:57
1918-Sep-12 18:53 00:02 Jupiter 1.98018018289972 1.98017880898173 1.98018155683887 4.09230660947085 3.98641103486774 2421849.286481576 1.74592354767306 334.703063440182 4.92716995408162 -77.6112449551986 13685291.3588607 T 47 CATAB v2.0f-lin.ifort 2021-Mar-16 10:57:57 2021-Mar-16 10:57
1968-Aug-13 15:58 < 00:01 Jupiter 1.9922327686852 1.99223200760976 1.99223352976074 4.09650857340391 3.9913729018044 2440082.165352331 0.796906362417231 57.9338466756001 35.3465967718761 -68.1961275036687 24928736.8716249 T 47 CATAB v2.0f-lin.ifort 2021-Mar-16 10:57:57 2021-Mar-16 10:57
1978-Sep-25 19:52 < 00:01 Jupiter 1.70245660305448 1.70245625044738 1.70245695566661 4.47415274311752 4.36153454785419 2443777.327540699 0.541869064352348 152.337485881559 3.54525075807063 -83.5606723064869 15431502.2174403 T 47 CATAB v2.0f-lin.ifort 2021-Mar-16 10:57:57 2021-Mar-16 10:57
2038-Sep-02 13:15 < 00:01 Jupiter 1.62727634584303 1.62727610984721 1.62727658183996 4.50506066975606 4.38799962323064 2465669.052391045 0.38978211887368 83.4119032894955 6.37381681675451 -83.6372179560338 20003987.6266838 T 47 CATAB v2.0f-lin.ifort 2021-Mar-16 10:57:57 2021-Mar-16 10:57
2098-Aug-14 05:21 00:01 Jupiter 1.78217841846246 1.782177528778 1.78217930814905 4.3238290306572 4.21247553149033 2487564.722925657 1.35533399099349 123.075883869939 21.7138890829347 70.6013215654757 12147167.6163892 T 47 CATAB v2.0f-lin.ifort 2021-Mar-16 10:57:57 2021-Mar-16 10:57
2108-Sep-25 13:44 00:02 Jupiter 1.88502771972576 1.88502631457166 1.88502912491854 4.37179846987127 4.26777898293704 2491259.072356019 1.68394835585473 436.948803388088 2.81027151017394 -80.6245576577457 15783996.783257 T 47 CATAB v2.0f-lin.ifort 2021-Mar-16 10:57:57 2021-Mar-16 10:57
2168-Sep-22 12:46 00:02 Jupiter 1.6607525510298 1.66075156594363 1.66075353616874 4.5290503259433 4.4150028575014 2513171.032033836 2.31855338979912 479.321305309459 5.69219533105039 -84.1950571442914 15116015.7129339 T 47 CATAB v2.0f-lin.ifort 2021-Mar-16 10:57:57 2021-Mar-16 10:57

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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