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268 Adorea (A887 LA)
Classification: Main-belt Asteroid          SPK-ID: 2000268
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 65 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1367859733079485 1.9355e-08  
a 3.092664173527248 1.0741e-08 au
q 2.669631094436701 6.4499e-08 au
i 2.440461134894022 3.0304e-07 deg
node 120.8543851112923 1.0622e-05 deg
peri 68.5593609592956 1.3482e-05 deg
M 268.8741695341581 1.0683e-05 deg
tp 2459899.347818510891
(2022-Nov-15.84781851)
6.0303e-05 TDB
period 1986.541178703194
5.44
1.0349e-05
2.833e-08
d
yr
n .1812195004359318 9.441e-10 deg/d
Q 3.515697252617795 1.2211e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3765  
   data-arc span      45778 days (125.33 yr)  
   first obs. used      1895-12-11  
   last obs. used      2021-04-12  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .44163  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 10:48:39  

Additional Information
 Earth MOID = 1.67227 au 
 Jupiter MOID = 1.43909 au 
 T_jup = 3.209 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456363.5 (2013-Mar-12.0) TDB
Reference: JPL 65 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1358376843981139 1.9381e-08  
q 2.673833679893153 6.4682e-08 au
tp 2455932.555634025203
(2012-Jan-06.05563403)
5.3213e-05 TDB
node 120.911340595662 1.0623e-05 deg
peri 69.6093013018793 1.3529e-05 deg
i 2.439768929306156 3.0295e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      3765  
   data-arc span      45778 days (125.33 yr)  
   first obs. used      1895-12-11  
   last obs. used      2021-04-12  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .44163  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 10:48:39  

Additional Information
 Jupiter MOID = 1.43909 au 
 T_jup = 3.209 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.756397345018195E-16 -1.242999775198775E-15 -6.14978404914123E-13 -3.586905963598916E-14 -4.314092119026335E-14 8.390851341059195E-16
q -1.242999775198775E-15 4.183752684791873E-15 2.009269205672693E-12 1.172530478848999E-13 1.47841904859682E-13 -2.668409078958719E-15
tp -6.14978404914123E-13 2.009269205672693E-12 2.831573678942172E-9 5.982727266718723E-12 4.105836836085341E-10 2.54122819768075E-12
node -3.586905963598916E-14 1.172530478848999E-13 5.982727266718723E-12 1.128446533561757E-10 -1.163358508766943E-10 -1.346554169236943E-12
peri -4.314092119026335E-14 1.47841904859682E-13 4.105836836085341E-10 -1.163358508766943E-10 1.830325262234157E-10 1.89147785024679E-12
i 8.390851341059195E-16 -2.668409078958719E-15 2.54122819768075E-12 -1.346554169236943E-12 1.89147785024679E-12 9.177599054808698E-14

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 8.42   n/a E2021B10 IRAS observations used: 3
diameter diameter 144.585 km 0.892 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 7.80 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Stephens, R.D. (2006) Minor Planet Bull. 33, 100-101.]
geometric albedo albedo 0.041   0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
B-V BV 0.663   0.039 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=5; phase (min.=3.02, mean=8.19, max.=16.88) deg.
U-B UB 0.285   0.026 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=5; phase (min.=3.02, mean=8.19, max.=16.88) deg.
Tholen spectral type spec_T FC   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo

268 Adorea (A887 LA)          Discovered 1887-Jun-08 by Borrelly, A. at Marseille
June 9 is date of first measurement.
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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