Asteroids

2025SP20 help

Last update: 2026-03-17 23:26 UTC

Orbital Properties

Epoch

61200.0

MJD

Orbit type

Apollo

Perihelion (q)

0.967

Aphelion (Q)

1.050

Eccentricity (e)

0.041

Inclination (i)

21.1

deg

Orbit period (P)

369.9

Earth MOID

0.00644

U parameter

6.4

Next Earth close approach

Date

2026-10-01

Nominal distance (from Earth center)

0.09063

13558526

Maximum Brightness

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

27.4

mag

Diameter

9 - 20*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2025-09-29

Observatory

JPL SynTrack Robotic Telescope, Auberry

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

61200.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.008540

1-sigma variation

0.000055

Unit

Eccentricity (e)

Value

0.041180

1-sigma variation

0.000011

Unit

Inclination (i)

Value

21.1332

1-sigma variation

0.0070

Unit

Long. of Ascending Node (Ω)

Value

185.9012

1-sigma variation

0.0002

Unit

Arg. of Perihelion (ω)

Value

274.0677

1-sigma variation

0.0778

Unit

Mean Anomaly (M)

Value

156.05824

1-sigma variation

0.05866

Unit

Perihelion distance

Value

0.967008

1-sigma variation

Unit

Aphelion distance

Value

1.050071

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.006461

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.007410

1-sigma variation

Unit

MOID

Value

0.006441

1-sigma variation

Unit

Orbit Period

Value

369.9456

1-sigma variation

Unit

U parameter

Value

6.4

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	3.06635E-9	5.25730E-10	3.61080E-7	-8.59304E-9	-4.30614E-6	3.24734E-6
e	5.25730E-10	1.28776E-10	4.74229E-8	-1.16958E-9	-7.41220E-7	5.64536E-7
i	3.61080E-7	4.74229E-8	4.83924E-5	-1.13434E-6	-5.05688E-4	3.79190E-4
Ω	-8.59304E-9	-1.16958E-9	-1.13434E-6	2.66378E-8	1.20388E-5	-9.03348E-6
ω	-4.30614E-6	-7.41220E-7	-5.05688E-4	1.20388E-5	6.04762E-3	-4.56109E-3
M	3.24734E-6	5.64536E-7	3.79190E-4	-9.03348E-6	-4.56109E-3	3.44077E-3

Date of computation: 2026-03-17 23:26 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

27.373

Unit

mag

Source

[1]

Slope Parameter (G)

Value

0.15**

Unit

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

193

Unit

Source

[1]

Normalized RMS of residuals

Value

1.11811

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

30 (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

Note: Ephemerides requests are limited to a maximum of 1000 points and a final date not exceeding 2040/12/31 00:00.

Close Approaches for 2025SP20 from 1950 to 2126

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 17:30	397.6	0.1175576	0.0507952	0.0222596
EARTH	1951-03-22 14:11	440.1	0.1721085	0.1250525	0.0156854
EARTH	1951-09-28 21:33	53.7	0.0388711	0.0194582	0.0065661
EARTH	1952-03-23 15:11	66.4	0.0966144	0.0925734	0.0013581
EARTH	1952-09-29 15:54	284.8	0.0338745	0.0020394	0.0118612
EARTH	1953-03-25 21:03	693.1	0.0248051	0.0037983	0.0177961
EARTH	1953-10-01 11:39	481.5	0.1023073	0.0393085	0.0210162
EARTH	1954-03-27 22:56	966.8	0.0418705	0.0040580	0.0238876
EARTH	1954-10-02 22:58	468.4	0.1735008	0.1003354	0.0244248
EARTH	1955-03-30 09:56	1006.4	0.1181175	0.0421372	0.0253590
EARTH	1956-04-01 03:50	948.2	0.1984063	0.1206867	0.0259105
EARTH	2023-09-26 09:06	37.7	0.1387851	0.1357354	0.0010166
EARTH	2024-03-21 12:19	5.6	0.1952672	0.1927195	0.0008493
EARTH	2024-09-27 14:31	20.0	0.0620775	0.0604964	0.0005272
EARTH	2025-03-23 10:29	< 1 min	0.1210148	0.1199864	0.0003429
EARTH	2025-09-29 11:18	< 1 min	0.0127831	0.0127702	0.0000043
EARTH	2026-03-25 15:53	10.6	0.0482663	0.0477170	0.0001837
EARTH	2026-10-01 14:09	17.4	0.0906331	0.0890797	0.0005178
EARTH	2027-03-27 22:51	21.5	0.0336234	0.0315024	0.0007071
EARTH	2027-10-03 07:40	28.8	0.1771040	0.1743506	0.0009179
EARTH	2028-03-29 17:10	23.6	0.1258426	0.1228402	0.0010008
EARTH	2086-09-26 03:20	437.2	0.1407241	0.1009915	0.0132592
EARTH	2087-03-22 18:19	296.1	0.1934538	0.1542129	0.0130846
EARTH	2087-09-28 18:04	429.0	0.0486449	0.0134523	0.0126013
EARTH	2088-03-23 20:42	337.0	0.1041818	0.0687936	0.0117988
EARTH	2088-09-29 22:20	336.5	0.0378128	0.0113142	0.0102439
EARTH	2089-03-26 05:53	310.2	0.0189347	0.0055170	0.0084529
EARTH	2089-10-02 02:12	193.0	0.1180718	0.1116989	0.0021555
EARTH	2090-03-28 10:34	14.7	0.0601629	0.0558070	0.0014599
EARTH	2090-10-03 21:53	38.8	0.1988925	0.1754558	0.0078183
EARTH	2091-03-31 00:13	342.9	0.1447301	0.1103592	0.0114570

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
82.61562558	83.58633992	0.00494150	MINIMUM
267.48549281	265.68951652	0.00890310	MINIMUM
355.09593192	354.57685813	0.35806811	SADDLE
174.99412597	174.70919501	0.38062405	SADDLE
356.19606768	175.78576081	1.95211640	SADDLE
172.07914067	351.66128274	1.99985066	SADDLE
106.68388358	286.15321638	2.01152387	MAXIMUM
244.53493911	64.25956685	2.01535314	MAXIMUM

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MOID Plots

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