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69 Hesperia (A861 HC)
Classification: Main-belt Asteroid          SPK-ID: 2000069
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 122 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1702603038572768 3.2088e-08  
a 2.976822652210646 7.7982e-09 au
q 2.469987922916037 9.4936e-08 au
i 8.590967392967034 3.8304e-06 deg
node 184.9850105271513 2.3774e-05 deg
peri 289.1127747319172 2.6567e-05 deg
M 17.89713810682225 1.2732e-05 deg
tp 2458907.237090859773
(2020-Feb-27.73709086)
6.6182e-05 TDB
period 1875.978555346969
5.14
7.3715e-06
2.018e-08
d
yr
n .1918998482013121 7.5406e-10 deg/d
Q 3.483657381505255 9.1259e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3198  
   data-arc span      58071 days (158.99 yr)  
   first obs. used      1861-04-29  
   last obs. used      2020-04-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4281  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 00:57:44  

Additional Information
 Earth MOID = 1.50238 au 
 Jupiter MOID = 1.70641 au 
 T_jup = 3.222 
[ 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 7.2   n/a MPO492748 IRAS observations used: 3
magnitude slope G 0.19   n/a PDS3 (MPC 17257) Fit
diameter diameter 138.13 km 4.7 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 3
rotation period rot_per 5.655 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Poutanen, M.; Bowell, E.; Martin, L.J.; Thompson, D.T. (1985) Astron. Astrophys. Suppl. Ser. 61, 291-297.]
[Di Martino, M.; Zappala, V.; De Sanctis, G.; Cacciatori, S. (1987) Icarus 69, 338-353.]
[Velichko, F.P.; Krugly, Yu.N. (1989) In "Methods of investigation of movement, physics and dynamic of Solar System small bodies, Dushanbe, p. 14-15 (in Russian).]
[De Angelis, G.; Mottola, S. (1995) Planet. Space Sci. 43, 1013-1017.]
[Hainaut-Rouelle, M.-C.; Hainaut, O.R.; Detal, A. (1995) Astron. Astrophys. Suppl. Ser. 112, 125-142.]
[Behrend, R. (2002) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Torppa, J.; Kaasalainen, M.; Michalowski, T.; Kwiatkowski, T.; et al. (2003) Icarus 164, 346-383.]
[Hanus, J.; Durech, J.; Broz, M.; Warner, B.D.; et al. (2011) Astron. Astrophys. 530, A134.]
[Hanus, J.; Marchis, F.; Durech, J. (2013) Icarus 226, 1045-1057.]
[Shevchenko, V.G.; Velichko, F.P.; Checha, V.A.; Krugly, Y.N. (2014) Minor Planet Bull. 41, 195-198.]
[Behrend, R. (2018) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.1402   0.010 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 3
B-V BV 0.674   0.021 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=5; phase (min.=6.83, mean=7.96, max.=9.99) deg.
U-B UB 0.230   0.045 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=5; phase (min.=6.83, mean=7.96, max.=9.99) deg.
Tholen spectral type spec_T M   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo
SMASSII spectral type spec_B X   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)

69 Hesperia (A861 HC)          Discovered 1861-Apr-29 by Schiaparelli, G. at Milan
Reference: 20150829/MPCPages.arcLast Updated: 2015-09-02

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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
1915-Sep-17 15:15 00:01 Jupiter 1.83751219690859 1.83751151893356 1.83751287488488 3.28355483081673 3.14003330835661 2420758.135185093 1.12872689574657 100.36955181986 14.213194033783 78.4732593094476 2806631.3491948 T 122 CATAB v2.0f-lin.ifort 2020-May-20 00:58:08 2020-May-20 00:58
1960-Oct-15 21:17 < 00:01 Jupiter 1.87323124066014 1.87323077433468 1.87323170698538 1.6572666196629 1.3572725824154 2437223.386538984 0.699057596040501 50.7597912013605 35.5724489754785 -32.2511598060996 2306979.88144378 T 122 CATAB v2.0f-lin.ifort 2020-May-20 00:58:08 2020-May-20 00:58
1997-Apr-14 07:21 < 00:01 Jupiter 1.74102349310826 1.7410231059246 1.74102388029173 1.66624432882329 1.34288994604966 2450552.806276331 0.245238114486776 76.3435230343231 62.6259979001075 48.8719330917036 2136240.86965385 T 122 CATAB v2.0f-lin.ifort 2020-May-20 00:58:08 2020-May-20 00:58
2033-Sep-24 07:44 < 00:01 Jupiter 1.72383997282156 1.7238396055881 1.72384034005492 2.52091477169439 2.31782124828506 2463864.822257634 0.375510844493518 53.2748220567976 16.6382222233859 87.5530469945598 2538358.46860142 T 122 CATAB v2.0f-lin.ifort 2020-May-20 00:58:08 2020-May-20 00:58
2070-Feb-25 06:15 < 00:01 Jupiter 1.8578072927895 1.85780681004112 1.85780777553818 3.47824477050514 3.34459785708384 2477167.760600559 0.798857383542932 72.1821414064659 14.6379634952481 79.5497929222561 3146442.16590712 T 122 CATAB v2.0f-lin.ifort 2020-May-20 00:58:08 2020-May-20 00:58
2115-Apr-09 22:31 00:01 Jupiter 1.84342326035701 1.84342252723857 1.84342399347482 1.57994381383782 1.25588833718153 2493646.438254131 1.44166572728839 71.8575153560969 52.8282543519431 -53.6478757794276 1975979.42262483 T 122 CATAB v2.0f-lin.ifort 2020-May-20 00:58:08 2020-May-20 00:58
2151-Oct-04 21:11 00:02 Jupiter 1.70781273444309 1.70781222834917 1.70781324053787 1.94363564497327 1.66906594244389 2506973.382367423 1.81134777582572 118.965691052721 51.9153158861826 -59.1387497297863 1854399.3276317 T 122 CATAB v2.0f-lin.ifort 2020-May-20 00:58:08 2020-May-20 00:58
2188-Mar-08 00:55 00:02 Jupiter 1.7203631954866 1.72036265210104 1.72036373887677 2.76404114249071 2.57977159165502 2520277.537909247 2.21500032918122 196.615624569305 14.2793152025839 89.4436880273609 2487134.41535347 T 122 CATAB v2.0f-lin.ifort 2020-May-20 00:58:08 2020-May-20 00:58

Alternate Designations
 A861 HC = 1932 CM1 = 1945 NB 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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