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80 Sappho

Classification: Main-belt Asteroid SPK-ID: 2000080

[ 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 39 (heliocentric ecliptic J2000)

Element	Value	Uncertainty (1-sigma)	Units
e	.2000324791359656	2.6519e-08
a	2.29586453349514	3.6209e-09	au
q	1.83661705909977	6.0792e-08	au
i	8.675455612369959	3.9996e-06	deg
node	218.6962016165739	2.1102e-05	deg
peri	139.6536747273566	2.4153e-05	deg
M	97.26388290088369	1.1599e-05	deg
t_p	2458257.205442758526 (2018-May-18.70544276)	4.064e-05	TDB
period	1270.62622754708 3.48	3.0059e-06 8.23e-09	d yr
n	.2833248615487602	6.7026e-10	deg/d
Q	2.75511200789051	4.3452e-09	au

Orbit Determination Parameters

# obs. used (total)	2403
data-arc span	56307 days (154.16 yr)
first obs. used	1865-10-08
last obs. used	2019-12-07
planetary ephem.	DE431
SB-pert. ephem.	SB431-N16
condition code	0
norm. resid. RMS	.53006
source	ORB
producer	Otto Matic
solution date	2019-Dec-13 20:36:24

Additional Information

Earth MOID = .842872 au

Jupiter MOID = 2.73526 au

T_jup = 3.553

[ 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	8.0		n/a	MPO502153	IRAS observations used: 29
diameter	diameter	68.563	km	1.033	urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)
rotation period	rot_per	14.030	h	n/a	LCDB (Rev. 2019-January); Warner et al., 2009	Published Reference List: [Harris, A.W.; Young, J.W. (1983) Icarus 54, 59-109.] [Debehogne, H.; Lagerkvist, C.-I.; Hahn, G. (1990) in Asteroids, Comets, Meteors III. C.-I. Lagerkvist, H. Rickman, B.A. Lindblad, M. Lindgren, eds. Uppsala, p. 45-48.] [Michalowski, T. (1993) Icarus 106, 563-572.] [Durech, J. (2006) IAU 2006, poster paper.] [Durech, J.; Kaasalainen, M.; Warner, B.D.; Fauerbach, M.; et al. (2009) Astron. Astrophys. 493, 291-297.] [Pilcher, F. (2010) Minor Planet Bull. 37, 148-149.] [Durech, J.; Kaasalainen, M.; Herald, D.; Dunham, D.; et al. (2011) Icarus 214, 652-670.] [Hanus, J.; Marchis, F.; Durech, J. (2013) Icarus 226, 1045-1057.] [Hanus, J.; Viikinkoski, M.; Marchis, F.; Durech, J.; et al (2017) Astron. Astrophys. 601, A114.]
geometric albedo	albedo	0.206		0.014	urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)
B-V	BV	0.901		0.019	EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2	#obs=4; phase (min.=7.56, mean=16.47, max.=25.92) deg.
U-B	UB	0.523		0.029	EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2	#obs=5; phase (min.=7.56, mean=18.69, max.=27.58) deg.
Tholen spectral type	spec_T	S		n/a	EAR-A-5-DDR-TAXONOMY-V4.0	used 7 color indices; used ground-based radiometric albedo
SMASSII spectral type	spec_B	S		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)

80 Sappho Discovered 1864-May-02 by Pogson, N. R. at Madras
May 3 is date of first measurement.
Reference: DISCOVERY.DB	Last Updated: 2003-08-29

[ show close-approach data ]

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

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