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59 Elpis (A860 RA)

Classification: Main-belt Asteroid SPK-ID: 2000059

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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 115 (heliocentric ecliptic J2000)

Element	Value	Uncertainty (1-sigma)	Units
e	.1183215837734439	2.4857e-08
a	2.715080186232266	5.9456e-09	au
q	2.393827598525367	6.6412e-08	au
i	8.642627013376558	2.5644e-06	deg
node	169.9504593662699	2.361e-05	deg
peri	210.6162272858053	2.8231e-05	deg
M	292.0111304518184	1.7349e-05	deg
t_p	2459509.108395742437 (2021-Oct-21.60839574)	7.9256e-05	TDB
period	1634.076624682588 4.47	5.3676e-06 1.47e-08	d yr
n	.220307906350431	7.2366e-10	deg/d
Q	3.036332773939165	6.6491e-09	au

Orbit Determination Parameters

# obs. used (total)	2883
data-arc span	56594 days (154.95 yr)
first obs. used	1865-12-09
last obs. used	2020-11-20
planetary ephem.	DE431
SB-pert. ephem.	SB431-N16
condition code	0
norm. resid. RMS	.45036
source	ORB
producer	Otto Matic
solution date	2021-Feb-24 19:03:07

Additional Information

Earth MOID = 1.39837 au

Jupiter MOID = 2.43508 au

T_jup = 3.335

[ show covariance matrix ]

Physical Parameter Table

Parameter	Symbol	Value	Units	Sigma	Reference	Notes
absolute magnitude	H	8.02		n/a	E2021B10	IRAS observations used: 14
diameter	diameter	165.119	km	4.506	urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)
rotation period	rot_per	13.671	h	n/a	LCDB (Rev. 2020-October); Warner et al., 2009	Published Reference List: [Debehogne, H.; Surdej, A.; Surdej, J. (1978) Astron. Astrophys. Suppl. Ser. 33, 1-5.] [Shevchenko, V.G.; Chiorny, V.G.; Kalashnikov, A.V.; Krugly, Yu.N.; et al. (1996) Astron. Astrophys. Suppl. Ser. 115, 475-479.] [Behrend, R. (2006) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] [Behrend, R. (2009) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] [Behrend, R. (2011) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] [Behrend, R. (2016) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] [Pilcher, F. (2018) Minor Planet Bull. 45, 181-182.] [Pilcher, F. (2019) Minor Planet Bull. 46, 445-448.] [Pilcher, F. (2020) Minor Planet Bull. 47, 344-346.]
geometric albedo	albedo	0.044		0.007	urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)
B-V	BV	0.662		0.027	EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2	#obs=3; phase (min.=17.13, mean=20.02, max.=21.48) deg.
U-B	UB	0.285		0.037	EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2	#obs=3; phase (min.=17.13, mean=20.02, max.=21.48) deg.
Tholen spectral type	spec_T	CP		n/a	EAR-A-5-DDR-TAXONOMY-V4.0	used 7 color indices; used ground-based radiometric albedo
SMASSII spectral type	spec_B	B		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)

59 Elpis (A860 RA) Discovered 1860-Sep-12 by Chacornac, J. at Paris
Reference: DISCOVERY.DB	Last Updated: 2003-08-29

Alternate Designations

A860 RA = A900 SC

2021-Mar-02 08:21 UT
(server date/time)

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