Asteroids

297418 2000SP43 help

Last update: 2025-11-12 13:15 UTC

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Aten

Perihelion (q)

0.433

Aphelion (Q)

1.190

Eccentricity (e)

0.467

Inclination (i)

10.3

deg

Orbit period (P)

267.0

Earth MOID

0.01928

U parameter

0.0

A₂

-21.5

10^-15au/days²

Next Earth close approach

Date

2025-12-08

Nominal distance (from Earth center)

0.18646

27894398

Maximum Brightness

18.2

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

18.5

mag

Diameter

440

Taxonomic type

Rotation period (T)

6.306

Discovery Information

Discovery Date

2000-09-25

Observatory

Lincoln Laboratory ETS, New Mexico

ORBIT VISUALISATION TOOLS

External links

Proper elements

Epoch

Near present day

Near middle of observation arc

Orbit properties

Epoch
Semimajor Axis
Eccentricity (e)
Inclination (i)
Long. of Ascending Node (Ω)
Arg. of Perihelion (ω)
Mean Anomaly (M)
Perihelion distance
Aphelion distance
Asc. Node-Earth Sep.
Desc. Node-Earth Sep.
MOID
Orbit Period
U parameter

Value

1-sigma variation

Unit

Epoch

Value

61000.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

0.811528

1-sigma variation

1.817E-9

Unit

Eccentricity (e)

Value

0.466852

1-sigma variation

4.105E-8

Unit

Inclination (i)

Value

10.3419

1-sigma variation

4.535E-6

Unit

Long. of Ascending Node (Ω)

Value

350.5240

1-sigma variation

1.445E-5

Unit

Arg. of Perihelion (ω)

Value

224.4729

1-sigma variation

1.271E-5

Unit

Mean Anomaly (M)

Value

249.81437

1-sigma variation

0.00001

Unit

Perihelion distance

Value

0.432664

1-sigma variation

Unit

Aphelion distance

Value

1.190392

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.055028

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.518390

1-sigma variation

Unit

MOID

Value

0.019278

1-sigma variation

Unit

Orbit Period

Value

267.0261

1-sigma variation

Unit

U parameter

Value

0.0

1-sigma variation

Unit

A₂

Value

-21.54914

1-sigma variation

1.96168

Unit

10^-15au/days²

Covariance Matrix

	a	e	i	Ω	ω	M	A₂
a	3.30322E-18	-2.69110E-17	-2.55887E-15	-8.12696E-15	4.69906E-15	-7.68666E-15	3.49344E-9
e	-2.69110E-17	1.68510E-15	8.53893E-14	2.10796E-13	-1.08162E-13	-1.26227E-13	-2.42566E-8
i	-2.55887E-15	8.53893E-14	2.05671E-11	5.05479E-11	-4.08212E-11	-8.26811E-12	-2.71386E-6
Ω	-8.12696E-15	2.10796E-13	5.05479E-11	2.08933E-10	-1.72470E-10	-2.89638E-11	-9.51824E-6
ω	4.69906E-15	-1.08162E-13	-4.08212E-11	-1.72470E-10	1.61642E-10	-5.13724E-12	6.38017E-6
M	-7.68666E-15	-1.26227E-13	-8.26811E-12	-2.89638E-11	-5.13724E-12	1.17617E-10	-9.39863E-6
A₂	3.49344E-9	-2.42566E-8	-2.71386E-6	-9.51824E-6	6.38017E-6	-9.39863E-6	3.84821E0

Date of computation: 2025-11-12 13:15 UTC

Note: The ASCII file is in a format suitable for Orbfit input.

Download ASCII file:

Physical properties

Rotation Period
Quality
Amplitude
Rotation Direction
Spinvector L
Spinvector B

Rotational properties

Value

Unit

Source

Rotation Period

Value

6.306

6.314

Unit

Source

[1]

[6]

Quality

Value

Unit

Source

[6]

Amplitude

Value

1.13

0.98

Unit

mag

Source

[1]

[6]

Rotation Direction

Value

Unit

Source

[-]

Spinvector L

Value

342

Unit

Source

[1]

Spinvector B

Value

Unit

Source

[1]

Taxonomy
Taxonomy (all)

Taxonomy

Value

Unit

Source

Taxonomy

Value

Unit

Source

[2]

[3]

Taxonomy (all)

Value

Sr;V

Unit

Source

[4]

[5]

Absolute Magnitude (H)
Slope Parameter (G)

H / G

Value

Unit

Source

Absolute Magnitude (H)

Value

18.523

Unit

mag

Source

[7]

Slope Parameter (G)

Value

0.15**

Unit

mag

Source

[7]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.377

0.39

Unit

Source

[8]

[9]

Diameter

Value

440

Unit

Source

[8]

Color Index Information

Color Index Information

Value

Unit

Source

Color Index Information

Value

0.5

0.8

Unit

V-R

B-V

Source

[6]

Sightings

Sightings

Value

Unit

Source

Sightings

Value

Radar R

Visual S

Unit

Source

[10]

[4]

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Sources

No.	Name	Additional
[1]	EARN	1.) Near-Earth Asteroid Lightcurve Analysis at the Center for Solar System Studies: 2019 September-2020 January, B.D. Warner
[2]	EARN	1.) Thomas, C.A. et al. (2014) Icarus 228, 217-246. (Physical characterization of Warm Spitzer-observed near-Earth objects)
[3]	EARN	1.) Alexey V. Sergeyev and Benoit Carry A&A, 652 (2021) A59
[4]	EARN	1.) Hicks, M. et al. (2011) href="http://www.astronomerstelegram.org/?read=3678"> ATel#3678 (Palomar Spectroscopy of Near-Earth Asteroids 2004 SV55, 2000 SP43, 3988 (1986 LA), 1036 Ganymed, and 2002 AG29) 2.) Thomas, C.A. et al. (2014) Icarus 228, 217-246. (Physical characterization of Warm Spitzer-observed near-Earth objects)
[5]	EARN	Earth Asteroids Research Node: https://earn.dlr.de
[6]	EARN	1.) Hergenrother, C.W. (2018) MPB 45, 237-238. (Near-Earth Asteroid (297418) 2000 SP43: Lightcurve and Color Photometry)
[7]	ESA Aegis	ESA orbit determination and impact monitoring system
[8]	EARN	1.) Joseph R. Masiero et al 2021 Planet. Sci. J. 2 162
[9]	EARN	1.) Nugent, C.R. et al. (2015) Astrophys. J. 814_117 (13pp) (NEOWISE Reactivation Mission Year One: Preliminary Asteroid Diameters and Albedos)(201 NEOs)
[10]	EARN	1.) href="http://echo.jpl.nasa.gov/asteroids/index.html">JPL's NEO Radar Detection Program Webpage

Observational Information

Arc Length
Unobserved
Normalized RMS of residuals

Arc Information

Value

Unit

Source

Arc Length

Value

9178

Unit

Source

[1]

Unobserved

Value

Unit

Source

[1]

Normalized RMS of residuals

Value

0.401658

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2000-09-25.10318

Unit

Source

[2]

Last Observation

Value

2025-11-11.573698

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

1267 (8)

Unit

Source

[1]

Radar Summary

First Observation
Last Observation
Delay (Discarded)
Doppler (Discarded)
Total Optical Observations (Discarded)

Radar

Value

Unit

Source

First Observation

Value

2011-10-16

Unit

Source

[3]

Last Observation

Value

2011-10-16

Unit

Source

[3]

Delay (Discarded)

Value

0 (0)

Unit

Source

[-]

Doppler (Discarded)

Value

1 (0)

Unit

Source

[1]

Total Radar Observations (Discarded)

Value

1 (0)

Unit

Source

[1]

Note: The ASCII file is in a format suitable for Orbfit input.

Sources

No.	Name	Additional
[1]	ESA Aegis	ESA orbit determination and impact monitoring system
[2]	MPC	Minor Planet Center: https://www.minorplanetcenter.net
[3]	JPL Radar Observations	Jet Propulsion Laboratory: https://ssd.jpl.nasa.gov/dat/radar_data_ast.txt

Computation parameters

As seen from:

Initial Date: *

Final Date: *

Output option:

One line per time step

Time step:*

* - these fields are required

Close Approaches for 297418 2000SP43 from 1950 to 2125

Body	Date in UTC	Time uncert. in min	Nominal distance in au	Min. possible distance in au	Distance uncert. in au
EARTH	1954-09-19 07:56	< 1 s	0.0329485	0.0329470	0.0000005
EARTH	1962-09-22 15:13	< 1 min	0.1706525	0.1706505	0.0000007
EARTH	1968-12-08 02:40	< 1 s	0.1776544	0.1776542	0.0000001
EARTH	1973-09-20 08:22	< 1 min	0.0738704	0.0738688	0.0000005
EARTH	1981-09-20 16:33	< 1 s	0.1103805	0.1103792	0.0000004
EARTH	1987-12-08 21:52	< 1 s	0.1825324	0.1825321	0.0000001
EARTH	1992-09-24 04:45	< 1 min	0.1262349	0.1262345	0.0000001
EARTH	2000-09-19 10:09	< 1 s	0.0608774	0.0608772	0.0000001
EARTH	2006-12-08 06:40	< 1 s	0.1923967	0.1923965	0.0000001
EARTH	2011-09-26 14:10	< 1 s	0.1392407	0.1392406	0.0000001
EARTH	2019-09-20 08:55	< 1 s	0.0683333	0.0683331	0.0000001
EARTH	2025-12-08 12:32	< 1 s	0.1864625	0.1864623	0.0000001
EARTH	2030-09-24 03:21	< 1 min	0.1204965	0.1204959	0.0000002
EARTH	2038-09-20 16:02	< 1 s	0.0897017	0.0897005	0.0000004
EARTH	2044-12-08 13:18	< 1 s	0.1823373	0.1823369	0.0000001
EARTH	2049-09-23 22:53	< 1 min	0.1202738	0.1202725	0.0000005
VENUS	2052-07-12 15:47	< 1 min	0.0474698	0.0474679	0.0000006
EARTH	2057-09-20 01:13	< 1 s	0.0688556	0.0688539	0.0000006
EARTH	2063-12-08 14:55	< 1 s	0.1957307	0.1957300	0.0000002
EARTH	2068-09-28 23:02	< 1 min	0.1582757	0.1582749	0.0000003
EARTH	2076-09-19 03:33	< 1 s	0.0204601	0.0204600	0.0000000
EARTH	2084-09-23 04:16	< 1 min	0.1855750	0.1855727	0.0000007
EARTH	2090-12-09 05:12	< 1 min	0.1769384	0.1769380	0.0000002
EARTH	2095-09-21 14:58	< 1 min	0.0811484	0.0811449	0.0000012
EARTH	2103-09-22 06:13	< 1 min	0.0916282	0.0916241	0.0000014
EARTH	2109-12-09 14:42	< 1 min	0.1901711	0.1901698	0.0000004
EARTH	2114-09-29 03:01	< 1 min	0.1493200	0.1493181	0.0000006
EARTH	2122-09-20 23:49	< 1 s	0.0367931	0.0367922	0.0000003

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
119.51328886	255.83199804	0.01927778	MINIMUM
244.77209090	335.90369915	0.17657097	MINIMUM
189.79207850	299.87266906	0.24438324	SADDLE
6.77204810	122.50535611	0.58339439	SADDLE
4.96926125	299.48212928	1.42295154	SADDLE
180.63511869	114.37890403	2.19373906	MAXIMUM

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MOID Plots

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