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JPL Small-Body Database Browser
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171 Ophelia (A877 AB)
Classification: Main-belt Asteroid          SPK-ID: 2000171
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 111 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1320474813997252 3.4398e-08  
a 3.130117395365083 1.0337e-08 au
q 2.716793276821656 1.0755e-07 au
i 2.546746702399211 3.4089e-06 deg
node 100.4765928246627 8.9148e-05 deg
peri 55.98180926315605 9.0102e-05 deg
M 261.2654696417181 1.4024e-05 deg
tp 2459555.261009800017
(2021-Dec-06.76100980)
7.9517e-05 TDB
period 2022.736754844494
5.54
1.002e-05
2.743e-08
d
yr
n .1779766937728269 8.8161e-10 deg/d
Q 3.54344151390851 1.1702e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3126  
   data-arc span      46000 days (125.94 yr)  
   first obs. used      1894-02-23  
   last obs. used      2020-02-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43737  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 15:19:36  

Additional Information
 Earth MOID = 1.72752 au 
 Jupiter MOID = 1.44544 au 
 T_jup = 3.198 
[ 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 8.6   n/a MPO502154 IRAS observations used: 10
diameter diameter 130.808 km 1.483 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 6.66535 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Behrend, R. (1977) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2005) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2006) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Oey, J. (2006) Minor Planet Bull. 33, 96-99.]
[Behrend, R. (2011) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Wang, X.; Muinonen, K.; Wang, Y.; Behrend, R.; et al. (2015) Astron. Astrophys. 581, A55.]
[Hanus, J.; Durech, J.; Oszkiewicz, D.A.; Behrend, R.; et al. (2016) Astron. Astrophys. 586, A108.]
geometric albedo albedo 0.076   0.009 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
B-V BV 0.695   0.014 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=5; phase (min.=2.86, mean=10.12, max.=13.28) deg.
U-B UB 0.341   0.021 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=6; phase (min.=2.86, mean=10.58, max.=13.28) 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)

171 Ophelia (A877 AB)          Discovered 1877-Jan-13 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
1901-Sep-01 21:43 00:02 Jupiter 1.84059616432715 1.84059505760545 1.84059727104833 2.49471428469507 2.30287231939224 2415629.404545669 1.87516997060142 43.2997664619019 24.9567259248115 -72.6695592825274 1405928.73338605 T 111 CATAB v2.0f-lin.ifort 2020-Feb-22 15:19:51 2020-Feb-22 15:20
1964-Sep-26 15:45 < 00:01 Jupiter 1.82745444305295 1.82745384139939 1.82745504470641 2.88333200651472 2.7178311804778 2438665.156263148 0.844400865804604 38.7654126121085 17.3622838601671 81.0624278366733 2340493.44916008 T 111 CATAB v2.0f-lin.ifort 2020-Feb-22 15:19:51 2020-Feb-22 15:20
1975-Jan-07 00:53 < 00:01 Jupiter 1.48732905934435 1.48732868213131 1.48732943655679 1.43420455857705 0.95810125933101 2442419.537085365 0.666625861659465 168.403267532575 113.685743718591 30.3459860341137 2120753.21295031 T 111 CATAB v2.0f-lin.ifort 2020-Feb-22 15:19:51 2020-Feb-22 15:20
1985-Apr-22 03:34 < 00:01 Jupiter 1.69351801601875 1.69351766988151 1.6935183621559 2.00433128680013 1.73696076855569 2446177.648817688 0.463949485279736 45.6931350638249 11.6078438967991 86.236911978514 3034627.07153032 T 111 CATAB v2.0f-lin.ifort 2020-Feb-22 15:19:51 2020-Feb-22 15:20
2048-May-15 23:59 < 00:01 Jupiter 1.98374180188733 1.98374133782053 1.98374226595402 3.58609272431942 3.46498146456489 2469212.499053957 0.611953676747438 34.1944899608494 18.4242081626726 87.1236042983917 3412769.82571017 T 111 CATAB v2.0f-lin.ifort 2020-Feb-22 15:19:51 2020-Feb-22 15:20
2058-Sep-03 21:17 < 00:01 Jupiter 1.5497730229551 1.54977262074854 1.54977342516121 1.69621981199142 1.33569057164447 2472975.387075235 0.83832535414877 79.6730675897161 49.0373744459131 86.8031216238367 2182935.44745048 T 111 CATAB v2.0f-lin.ifort 2020-Feb-22 15:19:51 2020-Feb-22 15:20
2068-Dec-18 08:24 00:01 Jupiter 1.55686932946627 1.55686876782288 1.55686989110957 1.59145089896702 1.20191763395338 2476733.849843177 1.04126313674999 115.394598622446 50.6299615160826 52.3947122271581 2358697.16502537 T 111 CATAB v2.0f-lin.ifort 2020-Feb-22 15:19:51 2020-Feb-22 15:20
2142-May-03 18:19 00:02 Jupiter 1.67169156488092 1.67169039621615 1.67169273354474 2.19167938691258 1.9468145186509 2503532.263334066 2.30574785830115 62.4706528928804 5.64362596158415 89.0396210718764 1262308.58376235 T 111 CATAB v2.0f-lin.ifort 2020-Feb-22 15:19:51 2020-Feb-22 15:20
2152-Aug-13 16:26 00:02 Jupiter 1.48258031059654 1.4825797695033 1.48258085169626 1.38876572242375 0.886587467362449 2507287.184824893 2.47835237511254 333.778638686888 133.142495399453 54.6422420582697 2517117.60030192 T 111 CATAB v2.0f-lin.ifort 2020-Feb-22 15:19:51 2020-Feb-22 15:20
2162-Nov-29 03:37 00:03 Jupiter 1.84242980292233 1.84242816287715 1.84243144296657 2.5665455608808 2.38069184483596 2511046.650505532 2.62222643605484 62.0456303677924 26.7959142210163 -53.3407495303127 1210521.31642344 T 111 CATAB v2.0f-lin.ifort 2020-Feb-22 15:19:51 2020-Feb-22 15:20
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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