Asteroids

2022UU8 help

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

Orbital Properties

Epoch

61200.0

MJD

Orbit type

Apollo

Perihelion (q)

0.894

Aphelion (Q)

1.122

Eccentricity (e)

0.113

Inclination (i)

6.4

deg

Orbit period (P)

369.6

Earth MOID

0.00282

U parameter

4.8

Next Earth close approach

Date

2026-04-25

Nominal distance (from Earth center)

0.02235

3343651

Maximum Brightness

mag

Risk

Object is in risk list

Physical Properties

Absolute Magnitude (H)

27.9

mag

Diameter

7 - 16*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2022-10-23

Observatory

Pan-STARRS 2, 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

61200.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.007928

1-sigma variation

0.000005

Unit

Eccentricity (e)

Value

0.112693

1-sigma variation

0.000004

Unit

Inclination (i)

Value

6.4444

1-sigma variation

0.0004

Unit

Long. of Ascending Node (Ω)

Value

34.8671

1-sigma variation

0.0002

Unit

Arg. of Perihelion (ω)

Value

86.4726

1-sigma variation

0.0036

Unit

Mean Anomaly (M)

Value

125.28270

1-sigma variation

0.00284

Unit

Perihelion distance

Value

0.894342

1-sigma variation

Unit

Aphelion distance

Value

1.121515

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.005774

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.003736

1-sigma variation

Unit

MOID

Value

0.002821

1-sigma variation

Unit

Orbit Period

Value

369.6093

1-sigma variation

Unit

U parameter

Value

4.8

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	2.09911E-11	2.02143E-11	1.95996E-9	1.09350E-9	1.62891E-8	-1.29896E-8
e	2.02143E-11	1.99306E-11	1.92266E-9	1.06186E-9	1.56902E-8	-1.26099E-8
i	1.95996E-9	1.92266E-9	1.85717E-7	1.02777E-7	1.52123E-6	-1.22054E-6
Ω	1.09350E-9	1.06186E-9	1.02777E-7	5.71330E-8	8.48626E-7	-6.78594E-7
ω	1.62891E-8	1.56902E-8	1.52123E-6	8.48626E-7	1.26403E-5	-1.00807E-5
M	-1.29896E-8	-1.26099E-8	-1.22054E-6	-6.78594E-7	-1.00807E-5	8.06010E-6

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

27.869

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

7 - 16*

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

Unit

Source

[1]

Unobserved

Value

1257

Unit

Source

[1]

Normalized RMS of residuals

Value

0.6257

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2022-10-23.462163

Unit

Source

[2]

Last Observation

Value

2022-10-30.87974

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

44 (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 2022UU8 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	2013-05-22 14:52	7.3	0.1585017	0.1582197	0.0000940
EARTH	2014-05-17 12:12	10.1	0.0930714	0.0928256	0.0000820
EARTH	2015-05-11 12:29	13.4	0.0422109	0.0420722	0.0000464
EARTH	2016-05-03 19:20	16.0	0.0359684	0.0358891	0.0000265
EARTH	2017-04-21 12:20	26.3	0.0707878	0.0706483	0.0000465
EARTH	2018-03-29 02:15	40.8	0.1114116	0.1112984	0.0000377
EARTH	2019-02-25 18:16	58.2	0.1393307	0.1392690	0.0000206
EARTH	2019-09-13 21:27	33.4	0.1368096	0.1367800	0.0000099
EARTH	2020-01-17 18:13	65.6	0.1438076	0.1438048	0.0000009
EARTH	2020-10-20 00:36	8.6	0.0946976	0.0946446	0.0000177
EARTH	2021-10-29 20:11	< 1 min	0.0434372	0.0434031	0.0000114
EARTH	2022-10-30 04:52	< 1 s	0.0038935	0.0038928	0.0000002
EARTH	2023-10-21 21:54	2.8	0.1066662	0.1066553	0.0000036
EARTH	2024-08-05 21:01	30.0	0.1617959	0.1617737	0.0000074
EARTH	2025-03-12 02:58	19.4	0.1219462	0.1218855	0.0000202
EARTH	2026-04-25 06:29	1.5	0.0223509	0.0222584	0.0000308
EARTH	2027-04-29 05:03	2.8	0.0533517	0.0533155	0.0000121
EARTH	2028-05-02 22:07	4.5	0.1441100	0.1439602	0.0000499
EARTH	2084-10-19 00:32	78.7	0.1940549	0.1885960	0.0018197
EARTH	2085-10-23 18:43	98.2	0.0988657	0.0935294	0.0017788
EARTH	2086-10-27 20:16	88.1	0.0113237	0.0066208	0.0015688
EARTH	2087-10-28 05:04	700.1	0.0018539	0.0007444	0.0076781
EARTH	2088-06-08 09:16	> 1 mo	0.1648883	0.1556164	0.2011596
EARTH	2089-04-08 18:22	> 1 mo	0.1435737	0.0338745	1.5254358
EARTH	2105-11-01 05:25	> 1 mo	0.0399586	0.0022878	17.0846866
EARTH	2106-05-24 18:22	> 1 mo	0.1463592	0.0895841	7.2971277
EARTH	2122-10-26 09:21	> 1 mo	0.0266232	0.0010619	106.6751418
EARTH	2123-06-23 03:36	> 1 mo	0.1749949	0.1111344	17.6762009
EARTH	2124-04-09 14:52	> 1 mo	0.0996929	0.0229265	64.2455996

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
278.53940108	294.91789498	0.00082689	MINIMUM
86.79740394	114.25514939	0.00430413	MINIMUM
2.82144561	24.61782099	0.13722957	SADDLE
182.51005362	204.52652923	0.16155504	SADDLE
4.23765242	206.17063487	1.91111779	SADDLE
183.36583356	25.29500777	2.10625759	MAXIMUM

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MOID Plots

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

Level lines of the squared distance function

2022UU8

Date in UTC	MJD	σ	Distance ± Width in RE	Stretching in RE	IP	Impact energy	PS
2111-04-24.920	92199.920	-0.803	0.94 ± 0.027	7.76E6	1.92E-7	1.46E-2	-8.59
2116-10-27.803	94212.803	0.138	2.65 ± 0.005	7.52E5	5.78E-7	1.47E-2	-8.13
2116-10-27.822	94212.822	0.090	1.81 ± 0.000	3.69E6	4.42E-7	1.47E-2	-8.25
2120-10-28.000	95674.000	-0.300	1.51 ± 0.001	9.00E4	1.91E-5	1.47E-2	-6.63
2121-10-28.185	96039.185	0.648	2.51 ± 0.002	2.44E5	2.72E-6	1.47E-2	-7.48


Based on 44 optical observations (of which 0 are rejected as outliers) from 2022/10/23.462 to 2022/10/30.880.
Coordinates are given on the Target Plane.
Unit is one Earth radius, but impact cross section has radius between 2.71 and 2.71 Earth radii.
Coordinates for LOV = EQU scaled= 1 second= F.
Aegis software version= 4.0, Date of computation=20250805 130500.123 UTC.

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Download Impactor Table as: