JPL Small-Body Database Browser

+ View the NASA Portal
+ Center for Near-Earth Object Studies

JPL Home

Earth

Solar System

Stars & Galaxies

Technology

JPL Solar System Dynamics

IMPORTANT: The SSD Announcement email list is now available. Major changes are coming in the near future, including possible hostname and/or URL changes. To be notified of such changes, subscribe to this email list.

Please visit this page for more details.

545 Messalina (A904 TC)

Classification: Outer Main-belt Asteroid SPK-ID: 2000545

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

[ hide orbit diagram ]

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.

[ revert to old Java-based viewer ]

Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 43 (heliocentric ecliptic J2000)

Element	Value	Uncertainty (1-sigma)	Units
e	.1696453763781662	3.3112e-08
a	3.202996246494784	1.5464e-08	au
q	2.659622742720323	1.0692e-07	au
i	11.20185526824081	4.4127e-06	deg
node	333.6160191033597	1.7459e-05	deg
peri	330.8662615896446	2.1752e-05	deg
M	117.2140882607324	1.3233e-05	deg
t_p	2457918.773173026235 (2017-Jun-14.27317303)	7.7584e-05	TDB
period	2093.789759850682 5.73	1.5163e-05 4.151e-08	d yr
n	.1719370334611214	1.2452e-09	deg/d
Q	3.746369750269245	1.8088e-08	au

Orbit Determination Parameters

# obs. used (total)	2559
data-arc span	41830 days (114.52 yr)
first obs. used	1904-10-03
last obs. used	2019-04-13
planetary ephem.	DE431
SB-pert. ephem.	SB431-N16
condition code	0
norm. resid. RMS	.4509
source	ORB
producer	Otto Matic
solution date	2019-May-29 19:09:22

Additional Information

Earth MOID = 1.65067 au

Jupiter MOID = 1.58823 au

T_jup = 3.141

[ 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	8.84		n/a	IRAS-A-FPA-3-RDR-IMPS-V6.0	IRAS observations used: 11
diameter	diameter	112.631	km	1.223	urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)
rotation period	rot_per	7.2	h	n/a	LCDB (Rev. 2019-January); Warner et al., 2009	Published Reference List: [Di Martino, M. (1984) Icarus 60, 541-546.] [Weidenschilling, S.J.; Chapman, C.R.; Davis, D.R.; Greenberg, R.; et al. (1990) Icarus 86, 402-447.] [Behrend, R. (2006) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo	albedo	0.041		0.005	urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)
B-V	BV	0.686		0.038	EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2	#obs=2; phase (min.=13.94, mean=14.07, max.=14.21) deg.
U-B	UB	0.343		0.058	EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2	#obs=1; phase=13.94 deg.
Tholen spectral type	spec_T	CD		n/a	EAR-A-5-DDR-TAXONOMY-V4.0	used 2 color indices
SMASSII spectral type	spec_B	Cb		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)

545 Messalina (A904 TC) Discovered 1904-Oct-03 by Gotz, P. at Heidelberg
Reference: DISCOVERY.DB	Last Updated: 2003-08-29

[ show close-approach data ]

Alternate Designations

A904 TC = 1949 YH = 1973 YO4

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

PRIVACY/COPYRIGHT

2019-Oct-21 16:41 UT
(server date/time)

Site Manager:	Ryan S. Park
Webmaster:	Alan B. Chamberlin