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281 Lucretia

Classification: Main-belt Asteroid SPK-ID: 2000281

[ 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 33 (heliocentric ecliptic J2000)

Element	Value	Uncertainty (1-sigma)	Units
e	.1321288361674428	3.4533e-08
a	2.188326504784479	5.142e-09	au
q	1.899185470552938	7.5471e-08	au
i	5.302022266323449	4.3797e-06	deg
node	31.39511795825656	4.2098e-05	deg
peri	16.5361472303165	4.5837e-05	deg
M	228.5942911320135	1.8502e-05	deg
t_p	2459432.096923466648 (2021-Aug-05.59692347)	6.1336e-05	TDB
period	1182.405953184932 3.24	4.1675e-06 1.141e-08	d yr
n	.3044639609859058	1.0731e-09	deg/d
Q	2.47746753901602	5.8214e-09	au

Orbit Determination Parameters

# obs. used (total)	3117
data-arc span	47140 days (129.06 yr)
first obs. used	1890-04-16
last obs. used	2019-05-10
planetary ephem.	DE431
SB-pert. ephem.	SB431-N16
condition code	0
norm. resid. RMS	.39319
source	ORB
producer	Otto Matic
solution date	2019-May-29 19:05:34

Additional Information

Earth MOID = .909437 au

Jupiter MOID = 2.87629 au

T_jup = 3.658

[ 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	12.0		n/a	MPO473764	IRAS observations used: 6
magnitude slope	G	0.28		n/a	PDS3 (MPC 17258)	Fit
diameter	diameter	11.036	km	0.145	urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)
rotation period	rot_per	4.348	h	n/a	LCDB (Rev. 2019-August); Warner et al., 2009	Published Reference List: [Taylor, R.C.; Gehrels, T.; Capen, R.C. (1976) Astron. J. 81, 778-786.] [Durech, J. (2006) IAU 2006, poster paper.] [Hanus, J.; Durech, J.; Broz, M.; Warner, B.D.; et al. (2011) Astron. Astrophys. 530, A134.] [Kryszczynska, A.; Colas, F.; Polinska, M.; Hirsch, R.; et al. (2012) Astron. Astrophys. 546, A72.] [Hanus, J.; Durech, J.; Broz, M.; Marciniak, A.; et al. (2013) Astron. Astrophys. 551, A67.]
geometric albedo	albedo	0.226		0.044	urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)
B-V	BV	0.918		0.023	EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2	#obs=5; phase (min.=6.59, mean=14.10, max.=21.70) deg.
U-B	UB	0.530		0.045	EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2	#obs=5; phase (min.=6.59, mean=12.63, max.=21.03) deg.
Tholen spectral type	spec_T	SU		n/a	EAR-A-5-DDR-TAXONOMY-V4.0	used 2 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)

281 Lucretia Discovered 1888-Oct-31 by Palisa, J. at Vienna
Reference: DISCOVERY.DB	Last Updated: 2003-08-29

[ show close-approach data ]

Alternate Designations

1948 EK = 1984 JX = A906 FD

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

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