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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 132 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05181598969565144 9.1879e-09  
a 3.117844836836714 9.3708e-09 au
q 2.956290620898542 2.7531e-08 au
i 6.963672878864529 2.7196e-07 deg
node 341.1633715191826 2.1098e-06 deg
peri 234.1021308387217 2.4535e-05 deg
M 341.1997712938358 2.2169e-05 deg
tp 2459305.512453632219
(2021-Apr-01.01245363)
0.00012374 TDB
period 2010.852309217056
5.51
9.0656e-06
2.482e-08
d
yr
n .1790285633359963 8.0712e-10 deg/d
Q 3.279399052774885 9.8564e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2859  
   data-arc span      54371 days (148.86 yr)  
   first obs. used      1872-04-25  
   last obs. used      2021-03-06  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .45299  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 10:19:12  

Additional Information
 Earth MOID = 1.95627 au 
 Jupiter MOID = 1.72282 au 
 T_jup = 3.204 
[ 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 7.78   n/a E2021B10 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 11:12 00:01 Jupiter 1.97262865555474 1.97262828405742 1.97262902705216 3.19082120231178 3.05328749300523 2430444.966841580 1.01334875975256 20.8581139032403 3.21695955015989 53.7718831677267 13387580.2519474 T 132 CATAB v2.0f-lin.ifort 2021-Apr-12 10:22:05 2021-Apr-12 10:22
1952-Apr-26 07:20 < 00:01 Jupiter 1.73700906258964 1.73700888680893 1.73700923837044 2.65367514834335 2.46307252978649 2434128.805798326 0.892885520490805 30.0090545013248 3.64794656976145 69.1654220179671 16042350.2632553 T 132 CATAB v2.0f-lin.ifort 2021-Apr-12 10:22:05 2021-Apr-12 10:22
1962-Jun-23 10:43 < 00:01 Jupiter 1.85644997827696 1.85644970029609 1.85645025625783 3.67841969955296 3.55221803200023 2437838.946536531 0.691862211590465 12.5954829267744 7.50744046617463 -22.7886017172909 7238778.02595797 T 132 CATAB v2.0f-lin.ifort 2021-Apr-12 10:22:05 2021-Apr-12 10:22
2024-Apr-23 00:21 < 00:01 Jupiter 1.82020950489776 1.8202093706145 1.82020963918102 2.52578215046372 2.33428546606672 2460423.514422269 0.247203838055637 4.63063961373346 1.89834152158042 55.781468348613 13176136.9810069 T 132 CATAB v2.0f-lin.ifort 2021-Apr-12 10:22:05 2021-Apr-12 10:22
2034-May-29 17:11 < 00:01 Jupiter 1.75599716483093 1.75599694735854 1.75599738230342 3.22606941880483 3.07291461243771 2464112.216132815 0.355573737553185 24.5853364338613 4.33110713202203 -74.7183617036139 12628911.4553015 T 132 CATAB v2.0f-lin.ifort 2021-Apr-12 10:22:05 2021-Apr-12 10:22
2096-Apr-17 11:35 00:01 Jupiter 1.92921259382396 1.92921216823503 1.92921301941289 2.99774910896739 2.84752487878963 2486715.982672421 1.24485125041343 25.9546104563737 3.03217636853539 62.4588213208795 14737085.7517297 T 132 CATAB v2.0f-lin.ifort 2021-Apr-12 10:22:05 2021-Apr-12 10:22
2106-May-15 10:28 00:01 Jupiter 1.7401795720044 1.7401794844374 1.74017965957139 2.71507296738125 2.52945302214102 2490394.935980607 1.41958746015157 69.9163003522745 2.80195780684746 82.5135536424681 15995117.0142095 T 132 CATAB v2.0f-lin.ifort 2021-Apr-12 10:22:05 2021-Apr-12 10:22
2116-Jul-15 13:41 00:01 Jupiter 1.91403781568764 1.91403708943303 1.91403854194226 3.87941962041886 3.76361967844647 2494109.070189292 1.45050094008801 32.5333580648155 4.80740598375984 5.56302727556264 3494534.50490571 T 132 CATAB v2.0f-lin.ifort 2021-Apr-12 10:22:05 2021-Apr-12 10:22
2178-May-12 19:10 00:03 Jupiter 1.79153423628812 1.79153379095945 1.7915346816169 2.4385296104892 2.23625653000498 2516690.298341656 2.54618041469404 31.3550626379098 2.14117506862109 50.7131270052134 13275917.30389 T 132 CATAB v2.0f-lin.ifort 2021-Apr-12 10:22:05 2021-Apr-12 10:22
2188-Jun-20 01:33 00:03 Jupiter 1.78615837487904 1.78615767734878 1.78615907241205 3.36428873530731 3.22024988888757 2520381.564266555 2.5141930301251 122.546807536777 6.32788900901851 -78.8625572729771 9386578.60071669 T 132 CATAB v2.0f-lin.ifort 2021-Apr-12 10:22:05 2021-Apr-12 10:22

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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