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86 Semele (A866 AA)
Classification: Main-belt Asteroid          SPK-ID: 2000086
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 108 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2154787781925476 2.2823e-08  
a 3.106697877848517 8.1059e-09 au
q 2.437270414916338 6.8829e-08 au
i 4.820249150539165 2.6859e-07 deg
node 86.08677300477883 1.4521e-05 deg
peri 308.8664912459514 1.696e-05 deg
M 135.1442398822928 6.5409e-06 deg
tp 2458645.669342517399
(2019-Jun-11.16934252)
3.4258e-05 TDB
period 2000.078116012638
5.48
7.8278e-06
2.143e-08
d
yr
n .1799929698334468 7.0445e-10 deg/d
Q 3.776125340780695 9.8525e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3610  
   data-arc span      54602 days (149.49 yr)  
   first obs. used      1871-12-29  
   last obs. used      2021-06-27  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .44549  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 10:31:04  

Additional Information
 Earth MOID = 1.44716 au 
 Jupiter MOID = 1.66924 au 
 T_jup = 3.179 
[ 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 8.76   n/a E2021B10 IRAS observations used: 11
diameter diameter 109.929 km 0.609 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 16.634 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Surdej, J.; Surdej, A.; Louis, B. (1983) Astron. Astrophys. Suppl. Ser. 52, 203-211.]
[Pilcher, F. (2020) Minor Planet Bull. 47, 192-195.]
geometric albedo albedo 0.056   0.009 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
B-V BV 0.703   0.021 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=6; phase (min.=3.71, mean=9.31, max.=17.22) deg.
U-B UB 0.321   0.022 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=5; phase (min.=3.71, mean=7.73, max.=13.25) deg.
Tholen spectral type spec_T C   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices

86 Semele (A866 AA)          Discovered 1866-Jan-04 by Tietjen, F. at Berlin
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
1924-Jan-16 23:15 00:01 Jupiter 1.76260618984754 1.76260569357439 1.76260668612098 1.82417836312131 1.53835116607275 2423801.468697886 1.16722554179283 67.0074349780666 4.43935266886967 -64.199626690915 14465315.8346387 T 108 CATAB v2.0g-lin.ifort 2021-Jul-08 10:32:40 2021-Jul-08 10:32
1934-Jan-28 01:12 00:01 Jupiter 1.75645653690275 1.75645624627782 1.75645682752948 1.41023827774454 1.01207935797106 2427465.549676565 1.03013101579579 141.429948432381 55.8529763660458 -63.0729952266227 4600146.60829506 T 108 CATAB v2.0g-lin.ifort 2021-Jul-08 10:32:40 2021-Jul-08 10:32
1995-May-12 04:20 < 00:01 Jupiter 1.76849704955685 1.76849679733119 1.7684973017825 1.8820125188126 1.60750432676039 2449849.680821463 0.263983417169836 26.3495235754351 3.76352857982917 -67.6803044640143 11164906.8984232 T 108 CATAB v2.0g-lin.ifort 2021-Jul-08 10:32:40 2021-Jul-08 10:32
2005-May-22 18:43 < 00:01 Jupiter 1.74900245948395 1.74900225717948 1.74900266178871 1.4061580917011 1.00434194379116 2453513.279867193 0.130488497302232 92.3282433464029 28.8316867018301 -34.1965868926763 6250408.91276789 T 108 CATAB v2.0g-lin.ifort 2021-Jul-08 10:32:40 2021-Jul-08 10:32
2066-Sep-02 14:16 < 00:01 Jupiter 1.76942174019807 1.76942158582143 1.76942189457481 1.92291598768614 1.6553566169765 2475896.094491070 0.683420383518954 28.239630300507 4.01488747467232 -75.1486506619113 9558469.5835392 T 108 CATAB v2.0g-lin.ifort 2021-Jul-08 10:32:40 2021-Jul-08 10:32
2076-Sep-14 17:49 < 00:01 Jupiter 1.73923977276277 1.73923941694968 1.73924012857852 1.40333370198676 0.997662681966922 2479561.242244629 0.820946292516027 162.120547419269 50.496826512053 -59.8555215474461 5434828.18596802 T 108 CATAB v2.0g-lin.ifort 2021-Jul-08 10:32:40 2021-Jul-08 10:32
2137-Dec-26 10:29 00:02 Jupiter 1.7730451602076 1.77304474992458 1.77304557049122 1.96741047780695 1.70741330049241 2501942.936866180 1.60095722026047 72.6114639007051 3.93327507820853 -78.9951501786821 8684116.60928357 T 108 CATAB v2.0g-lin.ifort 2021-Jul-08 10:32:40 2021-Jul-08 10:32
2148-Jan-08 15:57 00:02 Jupiter 1.72703042926851 1.72702986056734 1.72703099797822 1.40146703641663 0.99156913424189 2505608.164237078 1.73401493906789 260.189597406841 58.5459117708958 -69.9223929391179 5268648.71422975 T 108 CATAB v2.0g-lin.ifort 2021-Jul-08 10:32:40 2021-Jul-08 10:32

Alternate Designations
 A866 AA = 1978 BB 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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