Asteroids

2024DY help

Last update: 2025-04-25 20:32 UTC

Orbital Properties

Epoch

60800.0

MJD

Orbit type

Apollo

Perihelion (q)

0.810

Aphelion (Q)

2.281

Eccentricity (e)

0.476

Inclination (i)

0.7

deg

Orbit period (P)

701.8

Earth MOID

0.00070

U parameter

6.8

Next Earth close approach

Date

2025-11-06

Nominal distance (from Earth center)

0.12338

18457238

Maximum Brightness

30.2

mag

Risk

Object is in risk list

Object is not in priority list

Physical Properties

Absolute Magnitude (H)

28.9

mag

Diameter

4 - 10*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2024-02-19

Observatory

Mt. Lemmon Survey

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

1.545580

1-sigma variation

0.000282

Unit

Eccentricity (e)

Value

0.476017

1-sigma variation

0.000116

Unit

Inclination (i)

Value

0.7048

1-sigma variation

0.0001

Unit

Long. of Ascending Node (Ω)

Value

146.2706

1-sigma variation

0.0003

Unit

Arg. of Perihelion (ω)

Value

299.0824

1-sigma variation

0.0003

Unit

Mean Anomaly (M)

Value

249.28999

1-sigma variation

0.06973

Unit

Perihelion distance

Value

0.809858

1-sigma variation

Unit

Aphelion distance

Value

2.281303

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.018805

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.547448

1-sigma variation

Unit

MOID

Value

0.000697

1-sigma variation

Unit

Orbit Period

Value

701.8363

1-sigma variation

Unit

U parameter

Value

6.8

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	7.96538E-8	3.26772E-8	4.07557E-8	-2.97689E-8	-6.83217E-8	-1.96805E-5
e	3.26772E-8	1.34059E-8	1.67168E-8	-1.22592E-8	-2.80827E-8	-8.07372E-6
i	4.07557E-8	1.67168E-8	2.20508E-8	-7.43675E-9	-4.17819E-8	-1.00700E-5
Ω	-2.97689E-8	-1.22592E-8	-7.43675E-9	7.03204E-8	-1.85935E-8	7.35107E-6
ω	-6.83217E-8	-2.80827E-8	-4.17819E-8	-1.85935E-8	1.15225E-7	1.68787E-5
M	-1.96805E-5	-8.07372E-6	-1.00700E-5	7.35107E-6	1.68787E-5	4.86258E-3

Date of computation: 2025-02-19 13:28 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

28.893

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

4 - 10*

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

421

Unit

Source

[1]

Normalized RMS of residuals

Value

0.839763

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2024-02-19.366108

Unit

Source

[2]

Last Observation

Value

2024-03-01.41396

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

28 (1)

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 2024DY 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	2009-10-04 15:02	> 1 d	0.1892010	0.0592095	0.0436592
EARTH	2011-10-11 19:12	> 1 d	0.0855084	0.0156195	0.0305941
EARTH	2013-10-19 13:37	> 1 d	0.0188593	0.0156310	0.0077683
EARTH	2015-11-08 04:14	> 1 d	0.1096412	0.0844729	0.0084169
EARTH	2017-12-05 22:16	> 1 d	0.1597108	0.1543866	0.0017764
EARTH	2020-01-02 08:41	> 1 d	0.1593748	0.1551670	0.0014031
EARTH	2022-01-30 12:50	1151.6	0.1040834	0.0969531	0.0023769
EARTH	2024-02-18 15:27	< 1 min	0.0011473	0.0011464	0.0000003
EARTH	2025-11-06 04:59	1354.3	0.1233790	0.1167953	0.0021950
EARTH	2049-02-08 01:14	> 1 d	0.0745475	0.0012301	0.0319086
EARTH	2050-10-21 00:37	> 1 d	0.0586308	0.0098471	0.0305752
MARS	2052-07-29 06:04	1040.7	0.0415218	0.0381011	0.0083675
EARTH	2074-02-09 03:11	> 1 w	0.0705568	0.0012507	0.0695179
EARTH	2075-10-22 23:53	> 1 w	0.0673013	0.0099142	0.0660968
EARTH	2099-02-13 20:16	> 1 w	0.0435163	0.0009356	0.1018797
EARTH	2100-10-27 02:58	> 1 w	0.0863822	0.0099109	0.0669319
EARTH	2124-01-27 01:29	> 1 mo	0.1237097	0.0039369	0.2206102
EARTH	2125-10-14 21:24	> 1 mo	0.0099415	0.0099401	0.0000302

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
40.71922581	46.58881797	0.00064622	MINIMUM
318.19772355	279.11942111	0.00986105	MINIMUM
359.31065088	342.67105061	0.17378225	SADDLE
179.76281946	163.20847550	1.26532353	SADDLE
359.32445369	162.70516560	1.82576596	SADDLE
179.77782776	343.22153102	3.26448824	MAXIMUM

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MOID Plots

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

Level lines of the squared distance function

2024DY

Date in UTC	MJD	σ	σ_imp	Distance ± Width in RE	Stretching in RE/σ	IP	Exp. energy	PS	TS
2108-10-17.873	91280.873	1.187	0.000	1.15 ± 0.014	9.49E6	3.20E-8	2.72E-10	-9.55	0
2110-10-18.531	92011.531	1.249	0.000	1.19 ± 0.015	8.61E6	3.09E-8	2.62E-10	-9.57	0


Based on 31 optical observations (of which 4 are rejected as outliers) from 2024/02/19.366 to 2024/03/01.414.
Coordinates are given on the Target Plane.
Unit is one Earth radius, but impact cross section has radius between 1.39 and 1.39 Earth radii.
Coordinates for LOV = EQU scaled= 1 second= F.
Aegis software version= 4.0, Date of computation=20250305 085456.032 UTC.

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