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56 Melete

Classification: Main-belt Asteroid SPK-ID: 2000056

[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]

Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 106 (heliocentric ecliptic J2000)

Element	Value	Uncertainty (1-sigma)	Units
e	.2380827739019062	3.2871e-08
a	2.595744872041014	5.8941e-09	au
q	1.977742732563841	8.5196e-08	au
i	8.080990773256605	4.0462e-06	deg
node	192.9849354797338	2.6912e-05	deg
peri	105.0371245299217	2.8192e-05	deg
M	246.5129767905572	9.5976e-06	deg
t_p	2459082.043070559613 (2020-Aug-20.54307056)	4.1239e-05	TDB
period	1527.535928768959 4.18	5.2028e-06 1.424e-08	d yr
n	.2356736710540903	8.0271e-10	deg/d
Q	3.213747011518188	7.2974e-09	au

Orbit Determination Parameters

# obs. used (total)	2608
data-arc span	56213 days (153.90 yr)
first obs. used	1865-06-13
last obs. used	2019-05-10
planetary ephem.	DE431
SB-pert. ephem.	SB431-N16
condition code	0
norm. resid. RMS	.46549
source	ORB
producer	Otto Matic
solution date	2019-May-29 19:02:14

Additional Information

Earth MOID = .980357 au

Jupiter MOID = 2.0909 au

T_jup = 3.363

[ 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	8.5		n/a	MPO473760	IRAS observations used: 26
diameter	diameter	121.333	km	0.947	urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)
rotation period	rot_per	18.147	h	n/a	LCDB (Rev. 2019-January); Warner et al., 2009	Published Reference List: [Bel'skaya, I.N.; Dovgopol, A.N.; Erikson, A.; Lagerkvist, C.-I.; Oja, T. (1993) Astron. Astrophys. Suppl. Ser. 101, 507-511.] [Behrend, R. (2003) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] [Warner, B.D. (2007) Minor Planet Bull. 34, 104-107.] [Pilcher, F.; Jardine, D. (2009) Minor Planet Bull. 36, 52-54.] [Warner, B.D. (2011) http://www.minorplanetobserver.com/PDO/PDOLightcurves.htm] [Behrend, R. (2016) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] [Hanus, J.; Durech, J.; Oszkiewicz, D.A.; Behrend, R.; et al. (2016) Astron. Astrophys. 586, A108.] [Viikinkoski, M.; Hanus, J.; Kaasalainen, M.; Marchis, F.; Durech, J. (2017) Astron. Astrophys. 607, A117.]
geometric albedo	albedo	0.057		0.011	urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)
B-V	BV	0.697		0.033	EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2	#obs=4; phase (min.=4.79, mean=12.85, max.=28.04) deg.
U-B	UB	0.312		0.039	EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2	#obs=4; phase (min.=4.79, mean=12.85, max.=28.04) deg.
Tholen spectral type	spec_T	P		n/a	EAR-A-5-DDR-TAXONOMY-V4.0	used 7 color indices; used ground-based radiometric albedo
SMASSII spectral type	spec_B	Xk		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)

56 Melete Discovered 1857-Sep-09 by Goldschmidt, H. at Paris
Reference: DISCOVERY.DB	Last Updated: 2003-08-29

[ show close-approach data ]

Alternate Designations

1949 TH = 1986 EN5 = 1990 HG4

[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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