Asteroids

2024YR4 help

Last update: 2025-04-18 14:32 UTC

Orbital Properties

Epoch

60800.0

MJD

Orbit type

Apollo

Perihelion (q)

0.851

Aphelion (Q)

4.180

Eccentricity (e)

0.662

Inclination (i)

3.4

deg

Orbit period (P)

1457.6

Earth MOID

0.00283

U parameter

4.0

Next Earth close approach

Date

2028-12-17

Nominal distance (from Earth center)

0.05356

8012206

Maximum Brightness

22.7

mag

Risk

Object is in risk list

Object is not in priority list

Physical Properties

Absolute Magnitude (H)

mag

Diameter

40 - 90*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2024-12-27

Observatory

ATLAS Chile, Rio Hurtado

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

60800.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

2.515867

1-sigma variation

0.000014

Unit

Eccentricity (e)

Value

0.661548

1-sigma variation

0.000002

Unit

Inclination (i)

Value

3.4082

1-sigma variation

7.333E-6

Unit

Long. of Ascending Node (Ω)

Value

271.3656

1-sigma variation

8.024E-6

Unit

Arg. of Perihelion (ω)

Value

134.3614

1-sigma variation

1.077E-5

Unit

Mean Anomaly (M)

Value

40.40258

1-sigma variation

0.00035

Unit

Perihelion distance

Value

0.851500

1-sigma variation

Unit

Aphelion distance

Value

4.180235

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

1.613327

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.016140

1-sigma variation

Unit

MOID

Value

0.002828

1-sigma variation

Unit

Orbit Period

Value

1457.5721

1-sigma variation

Unit

U parameter

Value

4.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.98919E-10	2.83821E-11	1.02391E-10	-1.25137E-11	-1.03679E-10	-4.87159E-9
e	2.83821E-11	4.04972E-12	1.46121E-11	-1.74932E-12	-1.48568E-11	-6.95087E-10
i	1.02391E-10	1.46121E-11	5.37703E-11	-6.31967E-13	-5.89322E-11	-2.50785E-9
Ω	-1.25137E-11	-1.74932E-12	-6.31967E-13	6.43772E-11	-4.95813E-11	3.01936E-10
ω	-1.03679E-10	-1.48568E-11	-5.89322E-11	-4.95813E-11	1.16028E-10	2.54170E-9
M	-4.87159E-9	-6.95087E-10	-2.50785E-9	3.01936E-10	2.54170E-9	1.19307E-7

Date of computation: 2025-04-01 13:58 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

24.044

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

40 - 90*

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

Unit

Source

[1]

Normalized RMS of residuals

Value

0.490227

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2024-12-25.304941

Unit

Source

[2]

Last Observation

Value

2025-03-23.062069

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

489 (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 2024YR4 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	1952-09-02 06:19	127.3	0.0416566	0.0400764	0.0005616
EARTH	1956-08-30 17:58	201.8	0.0664049	0.0616741	0.0016032
EARTH	1960-09-08 22:37	359.9	0.0585096	0.0540725	0.0015402
EARTH	1964-08-30 01:48	297.8	0.0697404	0.0631476	0.0022592
EARTH	1972-08-24 03:35	218.8	0.1639247	0.1565860	0.0024511
EARTH	2012-08-29 00:17	51.6	0.1954444	0.1937341	0.0005703
EARTH	2016-09-08 15:35	51.8	0.0760196	0.0752567	0.0002562
EARTH	2020-10-26 19:06	83.5	0.1392242	0.1391318	0.0000308
EARTH	2024-12-25 04:45	< 1 s	0.0055400	0.0055400	0.0000000
EARTH	2028-12-17 12:17	46.7	0.0535583	0.0530413	0.0001723
EARTH	2032-12-22 08:34	48.2	0.0017896	0.0010216	0.0002560
EARTH	2066-09-21 08:23	> 1 mo	0.0692634	0.0647545	3.6982092
EARTH	2081-09-10 10:07	> 1 mo	0.0849478	0.0651633	18.7611485

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
22.95662437	352.06464713	0.00282823	MINIMUM
335.25785315	252.53395405	0.05921835	MINIMUM
358.10736147	300.29440541	0.14548379	SADDLE
358.87219440	121.98807040	1.85978486	SADDLE
179.74966125	123.24406286	3.17256969	SADDLE
179.81183820	303.27555307	5.17039816	MAXIMUM

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MOID Plots

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

Level lines of the squared distance function

2024YR4

Date in UTC	MJD	σ	σ_imp	Distance ± Width in RE	Stretching in RE/σ	IP	Exp. energy	PS	TS
2047-12-22.048	69066.048	3.062	0.000	0.34 ± 0.000	2.35E4	3.98E-7	3.14E-6	-5.52	0
2047-12-22.052	69066.052	0.013	0.000	0.19 ± 0.000	1.48E5	7.04E-6	5.55E-5	-4.27	0


Based on 503 optical observations (of which 27 are rejected as outliers) from 2024/12/25.305 to 2025/03/26.418.
Coordinates are given on the Target Plane.
Unit is one Earth radius, but impact cross section has radius between 1.32 and 1.32 Earth radii.
Coordinates for LOV = EQU scaled= 1 second= F.
Aegis software version= 5.0, Date of computation=20250403 143721.523 UTC.

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Download Impactor Table as: