Asteroids

2022SW24 help

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

Orbital Properties

Epoch

61200.0

MJD

Orbit type

Apollo

Perihelion (q)

0.913

Aphelion (Q)

3.160

Eccentricity (e)

0.552

Inclination (i)

5.8

deg

Orbit period (P)

1061.6

Earth MOID

0.00179

U parameter

7.5

Next Earth close approach

Date

2051-12-27

Nominal distance (from Earth center)

0.1234

18459868

Maximum Brightness

26.5

mag

Risk

Object is in risk list

Physical Properties

Absolute Magnitude (H)

28.3

mag

Diameter

6 - 13*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2022-09-28

Observatory

Mt. Lemmon Survey

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

2.036555

1-sigma variation

0.001336

Unit

Eccentricity (e)

Value

0.551721

1-sigma variation

0.000310

Unit

Inclination (i)

Value

5.7587

1-sigma variation

0.0028

Unit

Long. of Ascending Node (Ω)

Value

185.4578

1-sigma variation

0.0002

Unit

Arg. of Perihelion (ω)

Value

222.5763

1-sigma variation

0.0015

Unit

Mean Anomaly (M)

Value

86.19829

1-sigma variation

0.44066

Unit

Perihelion distance

Value

0.912945

1-sigma variation

Unit

Aphelion distance

Value

3.160165

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

1.389335

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.004766

1-sigma variation

Unit

MOID

Value

0.001794

1-sigma variation

Unit

Orbit Period

Value

1061.5551

1-sigma variation

Unit

U parameter

Value

7.5

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.78396E-6	4.14263E-7	3.65444E-6	-2.09545E-7	8.03798E-7	-5.88566E-4
e	4.14263E-7	9.62050E-8	8.50245E-7	-4.87145E-8	1.90187E-7	-1.36675E-4
i	3.65444E-6	8.50245E-7	7.89786E-6	-4.43731E-7	2.51003E-6	-1.20587E-3
Ω	-2.09545E-7	-4.87145E-8	-4.43731E-7	2.51930E-8	-1.23718E-7	6.91398E-5
ω	8.03798E-7	1.90187E-7	2.51003E-6	-1.23718E-7	2.22607E-6	-2.65617E-4
M	-5.88566E-4	-1.36675E-4	-1.20587E-3	6.91398E-5	-2.65617E-4	1.94180E-1

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

28.342

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

6 - 13*

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

0.9

Unit

Source

[1]

Unobserved

Value

1278

Unit

Source

[1]

Normalized RMS of residuals

Value

0.560297

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2022-09-28.170419

Unit

Source

[2]

Last Observation

Value

2022-09-29.092127

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

19 (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

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 2022SW24 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	1965-10-17 05:24	> 1 mo	0.0712519	0.0158440	1.3207612
EARTH	1985-09-24 11:50	> 1 w	0.0300993	0.0015071	0.2082492
EARTH	2002-12-24 16:16	> 1 w	0.1144828	0.1016220	0.0532319
EARTH	2022-09-30 10:07	< 1 min	0.0031714	0.0031662	0.0000017
EARTH	2051-12-27 14:36	> 1 w	0.1233966	0.0981931	0.1054557
EARTH	2054-09-14 17:12	> 1 w	0.1390931	0.0049799	0.1961583
EARTH	2083-10-01 19:03	> 1 w	0.0162276	0.0001250	0.1260118
EARTH	2115-12-31 18:46	> 1 mo	0.1357212	0.0983842	5.0233528
EARTH	2118-09-23 19:56	> 1 mo	0.0489456	0.0001437	7.3136429

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
336.95636704	266.18704784	0.00197661	MINIMUM
18.13558978	340.09862679	0.09628288	MINIMUM
4.97898213	316.59373221	0.10333337	SADDLE
358.87581517	125.41062088	1.92296282	SADDLE
179.81966590	126.25163556	2.15310894	SADDLE
179.51744438	306.09393999	4.14949982	MAXIMUM

Download:

MOID Plots

Click on the images to zoom-in and zoom-out

Level lines of the squared distance function

2022SW24

Date in UTC	MJD	σ	Distance ± Width in RE	Stretching in RE	IP	Impact energy	PS
2077-09-28.450	79939.450	-3.903	1.34 ± 0.006	5.54E3	3.36E-8	1.45E-2	-9.14
2077-09-28.453	79939.453	-2.651	0.63 ± 0.001	3.51E4	9.05E-7	1.47E-2	-7.71
2092-09-28.061	85418.061	0.867	1.05 ± 0.007	4.27E5	1.23E-6	1.50E-2	-7.67
2098-09-28.482	87609.482	0.837	1.36 ± 0.004	9.45E5	2.37E-7	1.50E-2	-8.42


Based on 19 optical observations (of which 0 are rejected as outliers) from 2022/09/28.170 to 2022/09/29.092.
Coordinates are given on the Target Plane.
Unit is one Earth radius, but impact cross section has radius between 1.41 and 1.41 Earth radii.
Coordinates for LOV = EQU scaled= 1 second= F.
AstOD software version= 4.0, Date of computation=20250805 130500.123 UTC.

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Download Impactor Table as: