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120 Lachesis (A872 GB)
Classification: Main-belt Asteroid          SPK-ID: 2000120
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 128 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05202197487020346 3.7554e-08  
a 3.118620485084016 1.0829e-08 au
q 2.956383688579274 1.1745e-07 au
i 6.963090729463577 4.1784e-06 deg
node 341.1625571592086 3.4028e-05 deg
peri 233.9639793879799 5.4068e-05 deg
M 305.5434848197809 4.3687e-05 deg
tp 2459304.791319362053
(2021-Mar-31.29131936)
0.00024455 TDB
period 2011.602736748941
5.51
1.0478e-05
2.869e-08
d
yr
n .1789617768077882 9.3216e-10 deg/d
Q 3.280857281588759 1.1393e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2652  
   data-arc span      54139 days (148.22 yr)  
   first obs. used      1872-04-25  
   last obs. used      2020-07-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45515  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:33:11  

Additional Information
 Earth MOID = 1.95737 au 
 Jupiter MOID = 1.72236 au 
 T_jup = 3.203 
[ 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 7.8   n/a MPO502153 IRAS observations used: 15
diameter diameter 155.132 km 1.133 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 46.551 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Bembrick, C.S.; Allen, B. (2005) Minor Planet Bull. 32, 45-46.]
[Pilcher, F. (2009) Minor Planet Bull. 36, 100-102.]
[Hanus, J.; Durech, J.; Oszkiewicz, D.A.; Behrend, R.; et al. (2016) Astron. Astrophys. 586, A108.]
geometric albedo albedo 0.058   0.003 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
B-V BV 0.707   0.013 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=7; phase (min.=.80, mean=5.33, max.=16.29) deg.
U-B UB 0.383   0.019 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=7; phase (min.=.80, mean=5.33, max.=16.29) deg.
Tholen spectral type spec_T C   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo
SMASSII spectral type spec_B C   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

120 Lachesis (A872 GB)          Discovered 1872-Apr-10 by Borrelly, A. at Marseille
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
1942-Mar-26 11:13 00:01 Jupiter 1.97262880616105 1.97262823976937 1.97262937255266 3.190822052863 3.05328839182909 2430444.967152875 1.1092592814994 40.6690176679148 20.8884474614593 -87.6733012998779 2726301.27221567 T 128 CATAB v2.0f-lin.ifort 2020-Nov-13 04:33:19 2020-Nov-13 04:33
1952-Apr-26 07:21 < 00:01 Jupiter 1.73700912433811 1.73700870203593 1.73700954664028 2.65367508923075 2.46307247204367 2434128.806122364 0.967067496878105 63.2353579649371 18.1895636032176 -84.5231889224045 2952613.14052666 T 128 CATAB v2.0f-lin.ifort 2020-Nov-13 04:33:19 2020-Nov-13 04:33
1962-Jun-23 10:43 < 00:01 Jupiter 1.85644987592691 1.85644941111586 1.85645034073786 3.67841878875318 3.55221708105101 2437838.946799796 0.731574918921064 70.2225699340646 19.5333553424404 87.0400359240024 3457602.13803189 T 128 CATAB v2.0f-lin.ifort 2020-Nov-13 04:33:19 2020-Nov-13 04:33
2024-Apr-23 00:21 < 00:01 Jupiter 1.82020947677116 1.82020905295059 1.82020990059172 2.52578262589924 2.33428597632358 2460423.514361381 0.305621512258145 43.6054362358994 6.97093558992011 -73.6236336014329 3279729.16070747 T 128 CATAB v2.0f-lin.ifort 2020-Nov-13 04:33:19 2020-Nov-13 04:33
2034-May-29 17:11 < 00:01 Jupiter 1.75599716614134 1.75599677932512 1.75599755295756 3.22606915925328 3.07291433920002 2464112.216124594 0.438742389012309 83.38435414567 15.496676604982 -89.5826874755179 3467834.38985507 T 128 CATAB v2.0f-lin.ifort 2020-Nov-13 04:33:19 2020-Nov-13 04:33
2096-Apr-17 11:35 00:01 Jupiter 1.92921267545501 1.92921210613816 1.92921324477174 2.99774961733033 2.84752541964416 2486715.982831437 1.41062122361527 43.8766733053124 19.0857414995587 -88.1203733804651 2555845.94056175 T 128 CATAB v2.0f-lin.ifort 2020-Nov-13 04:33:19 2020-Nov-13 04:33
2106-May-15 10:28 00:02 Jupiter 1.74017955080622 1.74017913779566 1.74017996381688 2.7150726060016 2.52945263083493 2490394.936248883 1.61407435010639 91.4522518011501 19.6574871308445 87.6917992797775 2990710.59749336 T 128 CATAB v2.0f-lin.ifort 2020-Nov-13 04:33:19 2020-Nov-13 04:33
2116-Jul-15 13:42 00:02 Jupiter 1.91403757475855 1.91403680143195 1.91403834808504 3.87941830226515 3.76361830428538 2494109.070505784 1.66604329458707 64.267524782233 34.2831956453787 84.8897731252171 2651215.33423535 T 128 CATAB v2.0f-lin.ifort 2020-Nov-13 04:33:19 2020-Nov-13 04:33
2178-May-12 19:11 00:03 Jupiter 1.79153449187979 1.79153382214387 1.7915351616156 2.43853025720488 2.23625726421184 2516690.299434253 2.86024618361017 50.2120925399787 26.2205365442882 89.216814929961 2872409.90972945 T 128 CATAB v2.0f-lin.ifort 2020-Nov-13 04:33:19 2020-Nov-13 04:33
2188-Jun-20 01:34 00:03 Jupiter 1.78615792878934 1.78615717986633 1.7861586777153 3.36428579063803 3.22024677491427 2520381.565464977 2.84070679565284 160.118592318815 19.5876059427907 -83.2600137108403 3098323.78596844 T 128 CATAB v2.0f-lin.ifort 2020-Nov-13 04:33:19 2020-Nov-13 04:33

Alternate Designations
 A872 GB = A910 CF = A918 UB 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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