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435 Ella (A898 RA)

Classification: Main-belt Asteroid SPK-ID: 2000435

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

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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.

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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 73 (heliocentric ecliptic J2000)

Element	Value	Uncertainty (1-sigma)	Units
e	.1557370980868938	3.8789e-08
a	2.448988548113453	6.2205e-09	au
q	2.067590178382229	9.5085e-08	au
i	1.816627809425122	3.9425e-06	deg
node	23.17922774843889	9.7693e-05	deg
peri	333.5414234888295	9.8221e-05	deg
M	162.7003316586218	1.1703e-05	deg
t_p	2457967.848567449789 (2017-Aug-02.34856745)	4.5349e-05	TDB
period	1399.840512900435 3.83	5.3335e-06 1.46e-08	d yr
n	.2571721540292393	9.7984e-10	deg/d
Q	2.830386917844678	7.1893e-09	au

Orbit Determination Parameters

# obs. used (total)	3138
data-arc span	44070 days (120.66 yr)
first obs. used	1898-09-11
last obs. used	2019-05-10
planetary ephem.	DE431
SB-pert. ephem.	SB431-N16
condition code	0
norm. resid. RMS	.44892
source	ORB
producer	Otto Matic
solution date	2019-May-29 19:07:27

Additional Information

Earth MOID = 1.06264 au

Jupiter MOID = 2.60465 au

T_jup = 3.479

[ 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	10.23		n/a	IRAS-A-FPA-3-RDR-IMPS-V6.0	IRAS observations used: 6
diameter	diameter	34.792	km	0.575	urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)
rotation period	rot_per	4.623	h	n/a	LCDB (Rev. 2019-January); Warner et al., 2009	Published Reference List: [Barucci, M.A.; Di Martino, M.; Fulchignoni, M. (1992) Astron. J. 103, 1679-1686.] [Piironen, J.; Lagerkvist, C.-I.; Erikson, A.; Oja, T.; et al. (1998) Astron. Astrophys. Suppl. Ser. 128, 525-540.] [Behrend, R. (2006) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] [Chang, C.-K.; Lin, H.-W.; Ip, W.-H.; Prince, T.A.; et al. (2016) Astrophys. J. Sup. Ser. 227, A20.] [Lang, K.; Jacobsen, J.; Kristensen, L.H.; Larsen, F.R. (2018) Minor Planet Bull. 45, 197-198.]
geometric albedo	albedo	0.118		0.017	urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)
B-V	BV	0.709		0.028	EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2	#obs=3; phase (min.=7.29, mean=7.98, max.=8.56) deg.
U-B	UB	0.280		0.082	EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2	#obs=3; phase (min.=7.29, mean=7.98, max.=8.56) deg.
Tholen spectral type	spec_T	DCX		n/a	EAR-A-5-DDR-TAXONOMY-V4.0	used 2 color indices

435 Ella (A898 RA) Discovered 1898-Sep-11 by Wolf, M. and Schwassmann, A. at Heidelberg
Reference: DISCOVERY.DB	Last Updated: 2003-08-29

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Alternate Designations

A898 RA = 1947 KE

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

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