Asteroids

2024UN8 help

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

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Aten

Perihelion (q)

0.701

Aphelion (Q)

1.043

Eccentricity (e)

0.196

Inclination (i)

1.9

deg

Orbit period (P)

297.5

Earth MOID

0.00031

U parameter

7.5

Next Earth close approach

Date

2033-12-20

Nominal distance (from Earth center)

0.09461

14153626

Maximum Brightness

25.4

mag

Risk

Object is in risk list

Physical Properties

Absolute Magnitude (H)

26.9

mag

Diameter

11 - 25*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2024-10-29

Observatory

Kitt Peak-Bok

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

0.872162

1-sigma variation

0.000183

Unit

Eccentricity (e)

Value

0.195777

1-sigma variation

0.000365

Unit

Inclination (i)

Value

1.9479

1-sigma variation

0.0039

Unit

Long. of Ascending Node (Ω)

Value

10.0385

1-sigma variation

0.0064

Unit

Arg. of Perihelion (ω)

Value

213.4957

1-sigma variation

0.0014

Unit

Mean Anomaly (M)

Value

276.89675

1-sigma variation

0.12631

Unit

Perihelion distance

Value

0.701413

1-sigma variation

Unit

Aphelion distance

Value

1.042911

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.001374

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.279109

1-sigma variation

Unit

MOID

Value

0.000309

1-sigma variation

Unit

Orbit Period

Value

297.5051

1-sigma variation

Unit

U parameter

Value

7.5

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	3.34155E-8	-6.66733E-8	-7.18791E-7	-1.16210E-6	-2.43478E-7	-2.30880E-5
e	-6.66733E-8	1.33033E-7	1.43418E-6	2.31803E-6	4.85967E-7	4.60679E-5
i	-7.18791E-7	1.43418E-6	1.54629E-5	2.50266E-5	5.22396E-6	4.96618E-4
Ω	-1.16210E-6	2.31803E-6	2.50266E-5	4.13733E-5	8.14789E-6	8.02047E-4
ω	-2.43478E-7	4.85967E-7	5.22396E-6	8.14789E-6	1.97862E-6	1.68387E-4
M	-2.30880E-5	4.60679E-5	4.96618E-4	8.02047E-4	1.68387E-4	1.59534E-2

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

26.916

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

11 - 25*

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

322

Unit

Source

[1]

Normalized RMS of residuals

Value

0.447325

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2024-10-28.17767

Unit

Source

[2]

Last Observation

Value

2024-11-10.09583

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

28 (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 2024UN8 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	1951-12-18 05:54	> 1 w	0.1101570	0.0340093	12.6760175
EARTH	1955-11-23 17:04	> 1 mo	0.0480873	0.0421160	0.6166711
VENUS	1959-06-08 00:57	> 1 mo	0.0441721	0.0372704	1.7808861
EARTH	1959-09-30 13:50	> 1 mo	0.0383188	0.0036352	5.9886387
VENUS	1972-06-01 14:10	> 1 mo	0.0405305	0.0005539	3.4469296
EARTH	1976-12-11 05:01	> 1 mo	0.0326388	0.0323896	0.2040112
EARTH	1980-10-01 16:42	> 1 w	0.0117576	0.0024586	0.1548861
VENUS	1987-11-06 12:43	> 1 w	0.0228494	0.0186532	0.0795404
EARTH	1989-12-20 23:46	450.1	0.0805647	0.0339379	0.1055281
VENUS	1990-03-08 21:15	> 1 mo	0.0404475	0.0382962	0.0303200
EARTH	1993-09-29 20:03	> 1 d	0.1433638	0.0043572	0.1502739
EARTH	2002-11-13 06:52	> 1 mo	0.0561045	0.0560205	0.0014068
EARTH	2011-12-19 07:49	217.1	0.1764809	0.1235454	0.0177818
VENUS	2015-07-16 19:13	> 1 d	0.0415733	0.0168736	0.0313179
EARTH	2015-09-29 14:47	1085.4	0.0421210	0.0015338	0.0274181
VENUS	2017-12-21 11:12	> 1 d	0.0253577	0.0170823	0.0106424
VENUS	2020-04-28 01:50	> 1 d	0.0398589	0.0392173	0.0013690
EARTH	2024-10-15 16:57	< 1 min	0.0388062	0.0385972	0.0000697
EARTH	2025-02-03 19:12	106.2	0.1839642	0.1829315	0.0003442
EARTH	2033-12-20 07:04	126.6	0.0946111	0.0514946	0.0152951
EARTH	2037-09-29 03:53	330.1	0.1092093	0.0504764	0.0195827
EARTH	2046-11-21 13:54	> 1 w	0.0546197	0.0489040	0.0023215
VENUS	2048-02-17 03:57	> 1 d	0.0180911	0.0179545	0.0015634
VENUS	2050-06-17 04:13	> 1 w	0.0402110	0.0401104	0.0035235
EARTH	2055-12-20 08:34	> 1 d	0.1320914	0.0318160	0.1808639
EARTH	2059-09-29 09:13	757.6	0.0800000	0.0001060	0.2249603
EARTH	2068-11-25 09:38	> 1 mo	0.0516013	0.0385076	0.0395674
EARTH	2077-12-20 00:18	1176.5	0.1335070	0.0586800	0.0260293
VENUS	2078-04-16 06:14	> 1 d	0.0492884	0.0148611	0.0477796
VENUS	2080-09-14 05:59	> 1 mo	0.0336658	0.0125202	0.0411307
EARTH	2081-09-28 22:15	> 1 d	0.1407304	0.0043991	0.0652472
VENUS	2083-01-18 16:37	> 1 w	0.0468558	0.0414773	0.0279278
EARTH	2090-10-24 02:03	> 1 w	0.0472592	0.0000317	0.0172337
EARTH	2099-12-19 12:31	> 1 d	0.1483175	0.0327951	0.0504623
EARTH	2103-09-30 08:26	> 1 d	0.0555746	0.0031579	0.0619490
VENUS	2108-06-07 08:35	> 1 d	0.0399955	0.0170828	0.0338076
VENUS	2110-11-08 09:32	> 1 d	0.0321004	0.0198937	0.0093618
EARTH	2112-10-30 07:53	> 1 w	0.0537459	0.0175769	0.0124598
VENUS	2113-03-13 07:08	> 1 w	0.0457480	0.0423588	0.0185034
EARTH	2121-12-20 18:45	> 1 d	0.1116133	0.0291226	0.1476451
EARTH	2125-09-29 18:23	> 1 d	0.0979869	0.0001810	0.1727616

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
138.76265517	267.96457180	0.00047538	MINIMUM
228.22389821	341.91499643	0.03228513	MINIMUM
186.61508454	307.44303510	0.05622817	SADDLE
5.90961828	127.44470044	0.30821852	SADDLE
5.39413068	306.82895010	1.69202445	SADDLE
183.63795397	125.03601822	2.05175318	MAXIMUM

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MOID Plots

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

Level lines of the squared distance function

2024UN8

Date in UTC	MJD	σ	Distance ± Width in RE	Stretching in RE	IP	Impact energy	PS
2069-10-02.131	77021.131	-4.762	1.55 ± 0.048	3.62E2	5.11E-8	5.95E-2	-8.40
2073-10-01.490	78481.490	-4.748	1.75 ± 0.006	1.75E6	1.01E-11	5.98E-2	-12.14
2073-10-01.728	78481.728	-4.777	1.52 ± 0.006	1.57E6	1.12E-11	5.95E-2	-12.10
2087-10-01.904	83594.904	-4.636	1.95 ± 0.006	6.43E4	3.95E-10	5.97E-2	-10.66


Based on 28 optical observations (of which 0 are rejected as outliers) from 2024/10/28.178 to 2024/11/10.096.
Coordinates are given on the Target Plane.
Unit is one Earth radius, but impact cross section has radius between 2.47 and 2.47 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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