Asteroids

154275 2002SR41 help

Last update: 2025-09-10 00:30 UTC

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.552

Aphelion (Q)

1.615

Eccentricity (e)

0.491

Inclination (i)

11.6

deg

Orbit period (P)

412.0

Earth MOID

0.03668

U parameter

0.0

Next Earth close approach

Date

2046-11-01

Nominal distance (from Earth center)

0.10448

15630434

Maximum Brightness

19.2

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

20.1

mag

Diameter

260 - 600*

Taxonomic type

Rotation period (T)

2.283

Discovery Information

Discovery Date

2002-09-30

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

1.083652

1-sigma variation

6.609E-10

Unit

Eccentricity (e)

Value

0.490788

1-sigma variation

2.185E-8

Unit

Inclination (i)

Value

11.5753

1-sigma variation

2.914E-6

Unit

Long. of Ascending Node (Ω)

Value

247.7664

1-sigma variation

1.138E-5

Unit

Arg. of Perihelion (ω)

Value

258.1973

1-sigma variation

1.041E-5

Unit

Mean Anomaly (M)

Value

109.22611

1-sigma variation

0.00001

Unit

Perihelion distance

Value

0.551809

1-sigma variation

Unit

Aphelion distance

Value

1.615495

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.100633

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.238839

1-sigma variation

Unit

MOID

Value

0.036675

1-sigma variation

Unit

Orbit Period

Value

412.0340

1-sigma variation

Unit

U parameter

Value

0.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	4.36819E-19	-9.42645E-18	-2.25272E-16	-2.86050E-16	2.35012E-16	-1.71841E-15
e	-9.42645E-18	4.77545E-16	1.07216E-14	5.65108E-14	-5.10763E-14	-5.57806E-15
i	-2.25272E-16	1.07216E-14	8.49235E-12	9.20660E-12	-8.70663E-12	-8.34763E-13
Ω	-2.86050E-16	5.65108E-14	9.20660E-12	1.29440E-10	-1.14218E-10	-1.55637E-11
ω	2.35012E-16	-5.10763E-14	-8.70663E-12	-1.14218E-10	1.08266E-10	5.79694E-12
M	-1.71841E-15	-5.57806E-15	-8.34763E-13	-1.55637E-11	5.79694E-12	2.75709E-11

Date of computation: 2025-09-10 00:30 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

2.283

Unit

Source

[2]

Quality

Value

Unit

Source

[2]

Amplitude

Value

0.1-0.16

Unit

mag

Source

[2]

Rotation Direction

Value

Unit

Source

[-]

Spinvector L

Value

Unit

Source

[-]

Spinvector B

Value

Unit

Source

[-]

Taxonomy
Taxonomy (all)

Taxonomy

Value

Unit

Source

Taxonomy

Value

Unit

Source

[1]

Taxonomy (all)

Value

Unit

Source

[1]

Absolute Magnitude (H)
Slope Parameter (G)

H / G

Value

Unit

Source

Absolute Magnitude (H)

Value

20.076

Unit

mag

Source

[3]

Slope Parameter (G)

Value

0.15**

Unit

mag

Source

[3]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.05 - 0.25

Unit

Source

[4]

Diameter

Value

260 - 600*

Unit

Source

[4]

Color Index Information

Color Index Information

Value

Unit

Source

Color Index Information

Value

Unit

mag

Source

[-]

Sightings

Sightings

Value

Unit

Source

Sightings

Value

Radar R

Unit

Source

[5]

Download this part as:

Sources

No.	Name	Additional
[1]	EARN	1.) Ieva, S. et al. (2018) Astron. Astrophys. 615, A127. (Photometric survey of 67 near-Earth objects)
[2]	EARN	1.) Warner, B.D. (2015) MPB 42, 41-53. (NEAR-EARTH ASTEROID LIGHTCURVE ANALYSIS AT CS3-PALMER DIVIDE STATION: 2014 JUNE-OCTOBER) (45 NEAs) 2.) Benishek, V. (2014) MPB 41, 257-260. (ROTATION PERIODS AND LIGHTCURVES FOR SIX NEAR-EARTH ASTEROIDS) (154275,275677, 387733,2011JR13,2013SU24,2013WT44)
[3]	ESA Aegis	ESA orbit determination and impact monitoring system
[4]	Estimation	Estimated from absolute magnitude
[5]	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

7586

Unit

Source

[1]

Unobserved

Value

841

Unit

Source

[1]

Normalized RMS of residuals

Value

0.477399

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2002-09-30.25996

Unit

Source

[2]

Last Observation

Value

2023-07-08.229855

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

488 (4)

Unit

Source

[1]

Radar Summary

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

Radar

Value

Unit

Source

First Observation

Value

2005-06-03

Unit

Source

[3]

Last Observation

Value

2014-06-20

Unit

Source

[3]

Delay (Discarded)

Value

0 (0)

Unit

Source

[-]

Doppler (Discarded)

Value

2 (0)

Unit

Source

[1]

Total Radar Observations (Discarded)

Value

2 (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 154275 2002SR41 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	1952-06-11 11:41	< 1 s	0.0960309	0.0960305	0.0000001
EARTH	1984-10-28 12:56	< 1 s	0.1340740	0.1340736	0.0000001
EARTH	1993-11-02 16:17	< 1 s	0.1005769	0.1005768	0.0000000
EARTH	1996-06-02 06:44	< 1 s	0.1372117	0.1372114	0.0000001
EARTH	2002-11-07 15:43	< 1 s	0.1329536	0.1329534	0.0000001
EARTH	2005-06-05 20:35	< 1 s	0.0626139	0.0626138	0.0000001
EARTH	2011-11-13 16:12	< 1 s	0.1917635	0.1917632	0.0000001
EARTH	2014-06-09 05:40	< 1 s	0.0419466	0.0419465	0.0000000
EARTH	2023-06-14 19:18	< 1 s	0.1456565	0.1456563	0.0000001
EARTH	2046-11-01 03:37	< 1 s	0.1044830	0.1044828	0.0000001
EARTH	2049-06-02 01:04	< 1 s	0.1534279	0.1534275	0.0000002
EARTH	2055-11-11 07:24	< 1 s	0.1665156	0.1665154	0.0000001
EARTH	2058-06-09 03:44	< 1 s	0.0405302	0.0405300	0.0000001
EARTH	2081-10-30 23:06	< 1 min	0.1123167	0.1123163	0.0000001
EARTH	2084-06-01 07:56	< 1 s	0.1686365	0.1686354	0.0000004
EARTH	2090-11-10 17:03	< 1 min	0.1606417	0.1606410	0.0000002
EARTH	2093-06-08 19:18	< 1 min	0.0391788	0.0391786	0.0000001
EARTH	2116-10-28 20:48	< 1 min	0.1500345	0.1500317	0.0000009
EARTH	2125-11-06 10:26	< 1 min	0.1066569	0.1066549	0.0000007

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
81.16823711	154.52400650	0.03597344	MINIMUM
283.89209305	298.56885266	0.09965120	MINIMUM
3.45154963	48.23082896	0.46090786	SADDLE
181.92467736	225.05670517	0.65458564	SADDLE
2.62265022	226.78642432	1.55614555	SADDLE
180.40378514	44.13417700	2.59156902	MAXIMUM

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MOID Plots

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