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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.


Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 129 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1701311074132536 3.1053e-08  
a 2.975555218201461 8.1204e-09 au
q 2.469320713759561 9.1014e-08 au
i 8.592680951979771 3.81e-06 deg
node 184.9842989787898 2.3021e-05 deg
peri 288.9817301910912 2.5899e-05 deg
M 94.04163688317463 1.2828e-05 deg
tp 2458906.757124411199
(2020-Feb-27.25712441)
6.5869e-05 TDB
period 1874.780587145568
5.13
7.6745e-06
2.101e-08
d
yr
n .1920224705057967 7.8606e-10 deg/d
Q 3.481789722643361 9.502e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3531  
   data-arc span      58499 days (160.16 yr)  
   first obs. used      1861-04-29  
   last obs. used      2021-06-28  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .42424  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 10:29:45  

Additional Information
 Earth MOID = 1.50216 au 
 Jupiter MOID = 1.70812 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. 2020-October); 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

[ 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
1915-Sep-17 15:16 00:01 Jupiter 1.83751268142334 1.837511978577 1.83751338427103 3.28355816494757 3.14003683439992 2420758.135921738 1.18774280249159 104.552166998548 13.9291000795308 78.3447677739004 2819212.17798486 T 129 CATAB v2.0g-lin.ifort 2021-Jul-08 10:30:41 2021-Jul-08 10:30
1960-Oct-15 21:17 < 00:01 Jupiter 1.87323115162067 1.87323069446174 1.87323160877937 1.65726578193639 1.35727154553354 2437223.386910580 0.73797502826555 49.2357099687691 34.5763230684704 -35.7504316763352 2405762.74918776 T 129 CATAB v2.0g-lin.ifort 2021-Jul-08 10:30:41 2021-Jul-08 10:30
1997-Apr-14 07:21 < 00:01 Jupiter 1.74102356532624 1.74102318408406 1.74102394656821 1.66624499843788 1.3428907939296 2450552.806313109 0.251917598397988 74.6461806245483 62.04674154988 51.2651613400889 2172727.00232974 T 129 CATAB v2.0g-lin.ifort 2021-Jul-08 10:30:41 2021-Jul-08 10:30
2033-Sep-24 07:44 < 00:01 Jupiter 1.72383997212751 1.72383961112321 1.72384033313181 2.52091535832174 2.31782188739996 2463864.822241086 0.381639552635907 52.6825188132338 16.389514176658 87.6933218425157 2599269.72124096 T 129 CATAB v2.0g-lin.ifort 2021-Jul-08 10:30:41 2021-Jul-08 10:30
2070-Feb-25 06:15 < 00:01 Jupiter 1.85780726250926 1.85780677573105 1.8578077492879 3.47824510718063 3.34459820574379 2477167.760612970 0.831741955280684 74.5313920064809 14.4407962101622 79.5109582232807 3177330.77645616 T 129 CATAB v2.0g-lin.ifort 2021-Jul-08 10:30:41 2021-Jul-08 10:30
2115-Apr-09 22:31 00:02 Jupiter 1.84342332661894 1.84342255624154 1.8434240969956 1.57994398504305 1.25588856773476 2493646.438339116 1.50134657081055 73.4073263815358 50.8734262066144 -51.9135026079226 1922119.68237872 T 129 CATAB v2.0g-lin.ifort 2021-Jul-08 10:30:41 2021-Jul-08 10:30
2151-Oct-04 21:11 00:02 Jupiter 1.7078127771859 1.70781225237273 1.70781330200023 1.94363627495816 1.66906668514308 2506973.382409387 1.89209845797881 120.891437651504 51.2459645435045 -58.2003265396629 1893033.71954368 T 129 CATAB v2.0g-lin.ifort 2021-Jul-08 10:30:41 2021-Jul-08 10:30
2188-Mar-08 00:54 00:02 Jupiter 1.72036315001843 1.72036260762858 1.72036369241355 2.76404127095779 2.57977172530858 2520277.537819107 2.31698920580894 204.960857412266 13.9739231052842 89.559866880535 2515097.98262208 T 129 CATAB v2.0g-lin.ifort 2021-Jul-08 10:30:41 2021-Jul-08 10:30

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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