Asteroids

2025SP20 help

Last update: 2025-09-30 14:37 UTC

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.968

Aphelion (Q)

1.051

Eccentricity (e)

0.041

Inclination (i)

21.1

deg

Orbit period (P)

370.3

Earth MOID

0.00494

U parameter

6.5

Next Earth close approach

Date

2026-03-25

Nominal distance (from Earth center)

0.04826

7219683

Maximum Brightness

23.6

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

27.4

mag

Diameter

9 - 20*

Taxonomic type

Rotation period (T)

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

1.009209

1-sigma variation

0.000061

Unit

Eccentricity (e)

Value

0.041301

1-sigma variation

0.000013

Unit

Inclination (i)

Value

21.1305

1-sigma variation

0.0072

Unit

Long. of Ascending Node (Ω)

Value

185.9215

1-sigma variation

0.0002

Unit

Arg. of Perihelion (ω)

Value

274.9773

1-sigma variation

0.0795

Unit

Mean Anomaly (M)

Value

320.61965

1-sigma variation

0.07655

Unit

Perihelion distance

Value

0.967528

1-sigma variation

Unit

Aphelion distance

Value

1.050890

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.004961

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.008928

1-sigma variation

Unit

MOID

Value

0.004943

1-sigma variation

Unit

Orbit Period

Value

370.3141

1-sigma variation

Unit

U parameter

Value

6.5

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	3.70253E-9	6.67486E-10	4.08696E-7	-9.06475E-9	-4.83778E-6	4.65612E-6
e	6.67486E-10	1.61556E-10	5.84564E-8	-1.30553E-9	-8.81265E-7	8.53291E-7
i	4.08696E-7	5.84564E-8	5.12168E-5	-1.13238E-6	-5.30359E-4	5.08542E-4
Ω	-9.06475E-9	-1.30553E-9	-1.13238E-6	2.50410E-8	1.17653E-5	-1.12824E-5
ω	-4.83778E-6	-8.81265E-7	-5.30359E-4	1.17653E-5	6.32329E-3	-6.08699E-3
M	4.65612E-6	8.53291E-7	5.08542E-4	-1.12824E-5	-6.08699E-3	5.86015E-3

Date of computation: 2025-09-30 14:37 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

Unit

Source

[-]

Quality

Value

Unit

Source

[-]

Amplitude

Value

Unit

mag

Source

[-]

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

[-]

Taxonomy (all)

Value

Unit

Source

[-]

Absolute Magnitude (H)
Slope Parameter (G)

H / G

Value

Unit

Source

Absolute Magnitude (H)

Value

27.365

Unit

mag

Source

[1]

Slope Parameter (G)

Value

0.15**

Unit

mag

Source

[1]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.05 - 0.25

Unit

Source

[2]

Diameter

Value

9 - 20*

Unit

Source

[2]

Color Index Information

Color Index Information

Value

Unit

Source

Color Index Information

Value

Unit

mag

Source

[-]

Sightings

Sightings

Value

Unit

Source

Sightings

Value

Unit

Source

[-]

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Sources

No.	Name	Additional
[1]	ESA Aegis	ESA orbit determination and impact monitoring system
[2]	Estimation	Estimated from absolute magnitude

Observational Information

Arc Length
Unobserved
Normalized RMS of residuals

Arc Information

Value

Unit

Source

Arc Length

Value

1.0

Unit

Source

[1]

Unobserved

Value

Unit

Source

[1]

Normalized RMS of residuals

Value

1.14911

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2025-09-29.148287

Unit

Source

[2]

Last Observation

Value

2025-09-30.117146

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

28 (2)

Unit

Source

[1]

Radar Summary

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

Radar

Value

Unit

Source

First Observation

Value

Unit

Source

[-]

Last Observation

Value

Unit

Source

[-]

Delay (Discarded)

Value

0 (0)

Unit

Source

[-]

Doppler (Discarded)

Value

0 (0)

Unit

Source

[-]

Total Radar Observations (Discarded)

Value

0 (0)

Unit

Source

[-]

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

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 2025SP20 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	1950-09-26 17:31	397.6	0.1175475	0.0508021	0.0222539
EARTH	1951-03-22 14:11	440.0	0.1721014	0.1250601	0.0156805
EARTH	1951-09-28 21:33	53.7	0.0388682	0.0194625	0.0065636
EARTH	1952-03-23 15:11	66.5	0.0966150	0.0925700	0.0013595
EARTH	1952-09-29 15:54	284.8	0.0338692	0.0020409	0.0118597
EARTH	1953-03-25 21:03	693.0	0.0248132	0.0037984	0.0177937
EARTH	1953-10-01 11:39	481.5	0.1022978	0.0393031	0.0210148
EARTH	1954-03-27 22:56	966.8	0.0418597	0.0040580	0.0238872
EARTH	1954-10-02 22:58	468.4	0.1734898	0.1003249	0.0244247
EARTH	1955-03-30 09:56	1006.4	0.1181061	0.0421261	0.0253589
EARTH	1956-04-01 03:50	948.2	0.1983946	0.1206751	0.0259105
EARTH	2023-09-26 09:06	37.7	0.1387855	0.1357358	0.0010166
EARTH	2024-03-21 12:19	5.6	0.1952676	0.1927199	0.0008493
EARTH	2024-09-27 14:31	20.0	0.0620777	0.0604966	0.0005272
EARTH	2025-03-23 10:29	< 1 min	0.1210150	0.1199865	0.0003429
EARTH	2025-09-29 11:18	< 1 min	0.0127831	0.0127702	0.0000043
EARTH	2026-03-25 15:53	10.6	0.0482662	0.0477170	0.0001837
EARTH	2026-10-01 14:09	17.4	0.0906334	0.0890800	0.0005178
EARTH	2027-03-27 22:51	21.5	0.0336237	0.0315027	0.0007071
EARTH	2027-10-03 07:40	28.8	0.1771044	0.1743510	0.0009179
EARTH	2028-03-29 17:10	23.6	0.1258430	0.1228406	0.0010008
EARTH	2086-09-26 03:21	437.2	0.1407180	0.1009848	0.0132594
EARTH	2087-03-22 18:19	296.1	0.1934478	0.1542064	0.0130848
EARTH	2087-09-28 18:04	429.0	0.0486391	0.0134480	0.0126013
EARTH	2088-03-23 20:42	337.0	0.1041763	0.0687884	0.0117987
EARTH	2088-09-29 22:20	336.5	0.0378175	0.0113165	0.0102438
EARTH	2089-03-26 05:53	310.2	0.0189308	0.0055170	0.0084524
EARTH	2089-10-02 02:12	193.0	0.1180728	0.1117046	0.0021539
EARTH	2090-03-28 10:34	14.8	0.0601622	0.0558006	0.0014618
EARTH	2090-10-03 21:53	38.7	0.1988889	0.1754432	0.0078213
EARTH	2091-03-31 00:12	343.0	0.1447248	0.1103442	0.0114602

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
82.61565888	83.58633939	0.00494155	MINIMUM
267.48552758	265.68951647	0.00890310	MINIMUM
355.09596536	354.57685858	0.35806815	SADDLE
174.99416070	174.70919389	0.38062411	SADDLE
356.19608664	175.78574542	1.95211641	SADDLE
172.07920997	351.66131778	1.99985069	SADDLE
106.68391169	286.15321001	2.01152392	MAXIMUM
244.53496349	64.25955689	2.01535315	MAXIMUM

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MOID Plots

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