Asteroids

2022SX55 help

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

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Aten

Perihelion (q)

0.503

Aphelion (Q)

1.169

Eccentricity (e)

0.398

Inclination (i)

10.9

deg

Orbit period (P)

279.3

Earth MOID

0.00008

U parameter

7.0

Next Earth close approach

Date

2029-12-13

Nominal distance (from Earth center)

0.18738

28031415

Maximum Brightness

29.7

mag

Risk

Object is in risk list

Physical Properties

Absolute Magnitude (H)

30.2

mag

Diameter

2.5 - 6*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2022-09-18

Observatory

Pan-STARRS 1, Haleakala

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

0.836258

1-sigma variation

0.000080

Unit

Eccentricity (e)

Value

0.398361

1-sigma variation

0.001209

Unit

Inclination (i)

Value

10.9175

1-sigma variation

0.0457

Unit

Long. of Ascending Node (Ω)

Value

354.3948

1-sigma variation

0.0014

Unit

Arg. of Perihelion (ω)

Value

221.0310

1-sigma variation

0.0102

Unit

Mean Anomaly (M)

Value

156.50320

1-sigma variation

0.05126

Unit

Perihelion distance

Value

0.503126

1-sigma variation

Unit

Aphelion distance

Value

1.169390

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.000179

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.454559

1-sigma variation

Unit

MOID

Value

0.000078

1-sigma variation

Unit

Orbit Period

Value

279.3244

1-sigma variation

Unit

U parameter

Value

7.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	6.32981E-9	-9.62018E-8	-3.63480E-6	-1.05004E-7	-8.07954E-7	-4.07625E-6
e	-9.62018E-8	1.46215E-6	5.52419E-5	1.59804E-6	1.22812E-5	6.19394E-5
i	-3.63480E-6	5.52419E-5	2.08732E-3	6.02061E-5	4.63917E-4	2.34097E-3
Ω	-1.05004E-7	1.59804E-6	6.02061E-5	1.88181E-6	1.34904E-5	6.70381E-5
ω	-8.07954E-7	1.22812E-5	4.63917E-4	1.34904E-5	1.03193E-4	5.19874E-4
M	-4.07625E-6	6.19394E-5	2.34097E-3	6.70381E-5	5.19874E-4	2.62794E-3

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

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

30.165

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

2.5 - 6*

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

1105

Unit

Source

[1]

Normalized RMS of residuals

Value

0.32991

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2022-09-18.338153

Unit

Source

[2]

Last Observation

Value

2022-09-19.267164

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

7 (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 2022SX55 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	1952-12-21 10:12	> 1 d	0.1542936	0.1507908	0.0427600
EARTH	1956-12-18 17:53	> 1 d	0.1957021	0.1504796	0.1092884
EARTH	1959-09-22 00:50	> 1 d	0.1978957	0.0034391	0.1348185
EARTH	1963-09-19 10:53	> 1 d	0.1136648	0.0027608	0.0767325
EARTH	1967-09-17 20:57	217.5	0.0306151	0.0078758	0.0076331
EARTH	1971-09-17 22:49	> 1 d	0.0295912	0.0016753	0.0662283
EARTH	1975-09-22 04:20	> 1 w	0.1082437	0.0092145	0.0725112
EARTH	1979-10-03 11:08	> 1 w	0.1745578	0.0427773	0.0576108
EARTH	1999-12-12 12:47	> 1 w	0.1954286	0.1514824	0.0263380
VENUS	2002-09-08 03:00	> 1 d	0.0420162	0.0411090	0.0088952
EARTH	2003-12-22 17:11	718.8	0.1553103	0.1499836	0.0091886
EARTH	2007-12-21 16:25	975.2	0.1631886	0.1528676	0.0104453
VENUS	2012-11-03 22:36	> 1 d	0.0470350	0.0387685	0.0139002
EARTH	2014-09-20 16:15	597.1	0.1590844	0.1171083	0.0139923
EARTH	2018-09-18 09:45	245.3	0.0728576	0.0487516	0.0080356
EARTH	2022-09-17 13:33	2.2	0.0003719	0.0003703	0.0000005
EARTH	2029-12-13 23:40	9.8	0.1873784	0.1844697	0.0010123
EARTH	2035-09-17 19:58	61.5	0.0014854	0.0000164	0.0103569
EARTH	2053-09-17 16:11	> 1 mo	0.0291140	0.0000073	14.0922629
EARTH	2060-09-20 06:56	> 1 mo	0.1694936	0.0013338	3.4808898
EARTH	2071-09-25 20:41	> 1 mo	0.1331563	0.0187338	25.9243103
EARTH	2075-12-20 07:11	> 1 mo	0.1867991	0.1863611	3.1293351
EARTH	2078-09-17 22:32	> 1 mo	0.0430082	0.0005174	52.7878993
EARTH	2096-09-17 11:39	> 1 mo	0.0271412	0.0007931	24.6664880
EARTH	2103-09-21 19:53	> 1 mo	0.1569645	0.0002214	12.6935212
EARTH	2114-10-03 13:19	> 1 mo	0.1693327	0.0350935	3.8585841
EARTH	2118-12-20 05:52	> 1 mo	0.1929192	0.1867465	3.3593759
EARTH	2121-09-18 17:57	> 1 mo	0.0231571	0.0017684	16.9580330

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
120.42996610	252.92812142	0.00050082	MINIMUM
246.21897833	339.79165163	0.18639772	MINIMUM
194.55936547	302.93463067	0.22988084	SADDLE
8.43686333	123.95842000	0.51432289	SADDLE
5.31111279	299.13718408	1.49280617	SADDLE
180.59276587	113.80309216	2.17147442	MAXIMUM

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MOID Plots

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

Level lines of the squared distance function

2022SX55

Date in UTC	MJD	σ	Distance ± Width in RE	Stretching in RE	IP	Impact energy	PS
2035-09-17.831	64587.831	-0.145	0.40 ± 0.007	2.41E2	4.22E-3	1.17E-3	-4.23
2037-09-17.286	65318.286	-0.167	0.26 ± 0.006	1.17E6	9.03E-7	1.17E-3	-7.96
2038-09-17.568	65683.568	-0.310	0.99 ± 0.006	4.40E4	1.63E-5	1.17E-3	-6.73
2040-09-17.060	66414.060	-0.159	0.03 ± 0.000	2.20E8	4.88E-9	1.17E-3	-10.33
2043-09-17.820	67509.820	-0.158	0.94 ± 0.000	1.16E7	6.74E-8	1.17E-3	-9.26
2045-09-17.265	68240.265	-0.125	0.72 ± 0.000	1.59E7	6.20E-8	1.17E-3	-9.35


Based on 7 optical observations (of which 0 are rejected as outliers) from 2022/09/18.338 to 2022/09/19.267.
Coordinates are given on the Target Plane.
Unit is one Earth radius, but impact cross section has radius between 1.36 and 1.36 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: