Asteroids

2025SM27 help

Last update: 2025-10-01 12:00 UTC

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.950

Aphelion (Q)

1.686

Eccentricity (e)

0.279

Inclination (i)

10.1

deg

Orbit period (P)

552.5

Earth MOID

0.03049

U parameter

7.1

Next Earth close approach

Date

2028-11-01

Nominal distance (from Earth center)

0.14467

21642639

Maximum Brightness

25.3

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

26.1

mag

Diameter

16 - 40*

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

1.317688

1-sigma variation

0.000283

Unit

Eccentricity (e)

Value

0.279135

1-sigma variation

0.000160

Unit

Inclination (i)

Value

10.1076

1-sigma variation

0.0059

Unit

Long. of Ascending Node (Ω)

Value

0.9908

1-sigma variation

0.0018

Unit

Arg. of Perihelion (ω)

Value

54.7736

1-sigma variation

0.0170

Unit

Mean Anomaly (M)

Value

6.03401

1-sigma variation

0.00727

Unit

Perihelion distance

Value

0.949874

1-sigma variation

Unit

Aphelion distance

Value

1.685501

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.042866

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.450705

1-sigma variation

Unit

MOID

Value

0.030494

1-sigma variation

Unit

Orbit Period

Value

552.4808

1-sigma variation

Unit

U parameter

Value

7.1

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	8.02750E-8	4.42542E-8	1.54573E-6	1.19878E-7	-2.00774E-6	9.79277E-7
e	4.42542E-8	2.56280E-8	7.71499E-7	3.20025E-9	-5.63023E-7	3.15368E-7
i	1.54573E-6	7.71499E-7	3.51328E-5	6.46008E-6	-7.42721E-5	3.35378E-5
Ω	1.19878E-7	3.20025E-9	6.46008E-6	3.40716E-6	-3.07786E-5	1.29222E-5
ω	-2.00774E-6	-5.63023E-7	-7.42721E-5	-3.07786E-5	2.90382E-4	-1.23633E-4
M	9.79277E-7	3.15368E-7	3.35378E-5	1.29222E-5	-1.23633E-4	5.28761E-5

Date of computation: 2025-10-01 12:00 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

26.093

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

16 - 40*

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

[-]

Download this part as:

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

0.8

Unit

Source

[1]

Unobserved

Value

Unit

Source

[1]

Normalized RMS of residuals

Value

0.66859

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2025-09-30.328507

Unit

Source

[2]

Last Observation

Value

2025-10-01.12926

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

23 (0)

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 2025SM27 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	1972-09-26 11:41	> 1 d	0.0556599	0.0281290	0.0645426
EARTH	1975-10-17 23:28	> 1 w	0.1100864	0.0008005	0.0697540
EARTH	1979-01-06 12:10	> 1 d	0.1947931	0.1764572	0.0331592
EARTH	2022-09-18 18:56	433.7	0.1769622	0.1587839	0.0060632
EARTH	2025-09-30 16:29	3.0	0.0308234	0.0307755	0.0000160
EARTH	2028-11-01 16:44	> 1 d	0.1446721	0.1312049	0.0045279
EARTH	2078-09-27 02:24	> 1 d	0.0603275	0.0297500	0.0695330
EARTH	2081-10-12 11:55	> 1 w	0.0916102	0.0163381	0.0502921
EARTH	2085-01-02 22:27	> 1 d	0.1796365	0.1750978	0.0053568

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
322.97701057	267.24973119	0.03049393	MINIMUM
182.79334526	135.72821889	0.69890995	SADDLE
358.86701975	133.30010488	1.95762714	SADDLE
177.40444266	311.64288308	2.66820941	MAXIMUM

Download:

MOID Plots

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