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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 124 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1702603055396135 3.2053e-08  
a 2.976822651103346 7.7347e-09 au
q 2.469987916989248 9.4797e-08 au
i 8.590967437432171 3.8213e-06 deg
node 184.9850108400011 2.3722e-05 deg
peri 289.1127733990655 2.6496e-05 deg
M 17.8971398321458 1.2603e-05 deg
tp 2458907.237081921060
(2020-Feb-27.73708192)
6.5513e-05 TDB
period 1875.978554300247
5.14
7.3115e-06
2.002e-08
d
yr
n .1918998483083846 7.4792e-10 deg/d
Q 3.483657385217444 9.0516e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3241  
   data-arc span      58275 days (159.55 yr)  
   first obs. used      1861-04-29  
   last obs. used      2020-11-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42743  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-17 19:31:17  

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. 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 15:15 00:01 Jupiter 1.83751222659834 1.8375115544977 1.83751289870024 3.28355498315827 3.14003347003318 2420758.135218296 1.12027732812236 99.5751839617199 14.1840680019021 78.5168198920669 2816707.83660696 T 124 CATAB v2.0f-lin.ifort 2020-Dec-17 19:31:27 2020-Dec-17 19:31
1960-Oct-15 21:17 < 00:01 Jupiter 1.87323122539737 1.87323076228828 1.87323168850625 1.65726646321079 1.35727238866871 2437223.386569198 0.694384053179728 50.5470656173429 35.4185327002672 -32.6691353704897 2325734.20495512 T 124 CATAB v2.0f-lin.ifort 2020-Dec-17 19:31:27 2020-Dec-17 19:31
1997-Apr-14 07:21 < 00:01 Jupiter 1.74102349227801 1.7410231060077 1.74102387854803 1.66624425742499 1.3428898572866 2450552.806267964 0.244648096244417 76.3216722755104 62.525372109313 48.7730849300347 2137082.73850491 T 124 CATAB v2.0f-lin.ifort 2020-Dec-17 19:31:27 2020-Dec-17 19:31
2033-Sep-24 07:44 < 00:01 Jupiter 1.72383997657839 1.72383961005231 1.72384034310437 2.52091479598306 2.31782127516396 2463864.822251000 0.373156633989394 53.1356922762705 16.6053635388314 87.49760623844 2540927.41245638 T 124 CATAB v2.0f-lin.ifort 2020-Dec-17 19:31:27 2020-Dec-17 19:31
2070-Feb-25 06:15 < 00:01 Jupiter 1.85780728571816 1.85780680318322 1.85780776825342 3.47824477634534 3.34459786263854 2477167.760580283 0.793197357967745 71.8074995607461 14.6078096736947 79.4725835297831 3153829.99374143 T 124 CATAB v2.0f-lin.ifort 2020-Dec-17 19:31:27 2020-Dec-17 19:31
2115-Apr-09 22:31 00:01 Jupiter 1.84342328066463 1.84342254974282 1.84342401158581 1.57994380075525 1.25588832475372 2493646.438218026 1.43087675570789 71.7847305364062 52.7648626730167 -53.5625645135081 1976843.70008348 T 124 CATAB v2.0f-lin.ifort 2020-Dec-17 19:31:27 2020-Dec-17 19:31
2151-Oct-04 21:11 00:02 Jupiter 1.70781274716696 1.70781224282297 1.70781325151192 1.94363554102984 1.66906582361516 2506973.382314243 1.79748338493885 118.143155493436 51.868792473874 -59.216783059505 1858724.01369523 T 124 CATAB v2.0f-lin.ifort 2020-Dec-17 19:31:27 2020-Dec-17 19:31
2188-Mar-08 00:54 00:02 Jupiter 1.72036317790678 1.72036263625888 1.72036371955919 2.7640409604102 2.57977139461851 2520277.537836445 2.19816341946108 195.273240688688 14.266884333534 89.4264900112663 2493445.62538078 T 124 CATAB v2.0f-lin.ifort 2020-Dec-17 19:31:27 2020-Dec-17 19:31

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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