Asteroids

2024YR4 help

Last update: 2025-02-02 13:36 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

5.5

Next Earth close approach

Date

2028-12-17

Nominal distance (from Earth center)

0.05269

7881683

Maximum Brightness

22.5

mag

Risk

Object is in risk list

Object is not in priority list

Physical Properties

Absolute Magnitude (H)

23.9

mag

Diameter

40 - 100*

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

2.515939

1-sigma variation

0.000139

Unit

Eccentricity (e)

Value

0.661558

1-sigma variation

0.000020

Unit

Inclination (i)

Value

3.4082

1-sigma variation

0.0001

Unit

Long. of Ascending Node (Ω)

Value

271.3656

1-sigma variation

1.625E-5

Unit

Arg. of Perihelion (ω)

Value

134.3614

1-sigma variation

0.0001

Unit

Mean Anomaly (M)

Value

40.40084

1-sigma variation

0.00340

Unit

Perihelion distance

Value

0.851498

1-sigma variation

Unit

Aphelion distance

Value

4.180379

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

1.613371

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

1457.6341

1-sigma variation

Unit

U parameter

Value

5.5

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.93121E-8	2.75870E-9	1.02235E-8	-1.82899E-9	-1.14202E-8	-4.72602E-7
e	2.75870E-9	3.94076E-10	1.46042E-9	-2.61240E-10	-1.63143E-9	-6.75104E-8
i	1.02235E-8	1.46042E-9	5.41426E-9	-9.57646E-10	-6.05598E-9	-2.50189E-7
Ω	-1.82899E-9	-2.61240E-10	-9.57646E-10	2.64037E-10	1.00447E-9	4.47530E-8
ω	-1.14202E-8	-1.63143E-9	-6.05598E-9	1.00447E-9	6.84039E-9	2.79475E-7
M	-4.72602E-7	-6.75104E-8	-2.50189E-7	4.47530E-8	2.79475E-7	1.15654E-5

Date of computation: 2025-02-02 13:14 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

23.872

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 - 100*

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

0.7

Unit

Source

[1]

Normalized RMS of residuals

Value

0.475785

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

2025-02-02.233998

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

317 (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	1952-09-01 10:57	> 1 d	0.0474003	0.0360321	0.0213159
EARTH	1956-08-29 18:37	> 1 d	0.0778130	0.0361458	0.0319277
EARTH	1960-09-07 11:57	> 1 d	0.0501617	0.0406191	0.0171140
EARTH	1964-08-28 21:16	> 1 d	0.0833465	0.0404271	0.0313552
EARTH	1972-08-23 06:32	> 1 d	0.1775258	0.0929186	0.0291847
EARTH	2012-08-28 19:38	500.2	0.1983130	0.1816837	0.0055679
EARTH	2016-09-08 11:10	506.6	0.0773303	0.0701474	0.0025866
EARTH	2020-10-26 13:30	821.5	0.1390663	0.1381352	0.0003120
EARTH	2024-12-25 04:45	< 1 s	0.0055401	0.0055396	0.0000002
EARTH	2028-12-17 16:13	456.9	0.0526858	0.0475766	0.0017035
EARTH	2032-12-22 12:33	453.8	0.0005054	0.0000126	0.0024834
EARTH	2049-09-18 14:26	> 1 mo	0.0806055	0.0634539	41.4595934
EARTH	2076-11-26 15:10	> 1 mo	0.1270801	0.0290549	101.6241688
EARTH	2103-12-26 22:40	> 1 mo	0.0093647	0.0048943	130.0262936
EARTH	2121-01-08 00:33	> 1 mo	0.1457391	0.0102264	7436.2365446

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
22.95624933	352.06465136	0.00282827	MINIMUM
335.25827707	252.53387949	0.05921901	MINIMUM
358.10740145	300.29436774	0.14548538	SADDLE
358.87222155	121.98803503	1.85978332	SADDLE
179.74967623	123.24402584	3.17271381	SADDLE
179.81185040	303.27551416	5.17054225	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	Distance ± Width in RE	Stretching in RE/σ	IP	Exp. energy	PS	TS
2032-12-22.585	63588.585	0.673	0.32 ± 0.000	5.76E1	1.41E-2	1.21E-1	-0.48	3
2039-12-23.350	66145.350	0.409	0.91 ± 0.000	4.84E5	1.42E-6	1.23E-5	-4.75	0
2047-12-22.047	69066.047	0.164	0.53 ± 0.000	3.73E5	2.68E-6	2.25E-5	-4.67	0
2047-12-22.051	69066.051	-0.047	0.22 ± 0.003	2.76E6	3.77E-7	3.16E-6	-5.52	0
2079-12-22.727	80754.727	0.562	1.10 ± 0.000	1.39E7	3.52E-8	2.99E-7	-6.93	0


Based on 317 optical observations (of which 31 are rejected as outliers) from 2024/12/25.305 to 2025/02/02.234.
Coordinates are given on the Target Plane.
Unit is one Earth radius, but impact cross section has radius between 1.31 and 1.31 Earth radii.
Coordinates for LOV = EQU scaled= 1 second= F.
Aegis software version= 5.0, Date of computation=20250202 134829.473 UTC.

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