Asteroids

2024HJ help

Last update: 2025-05-06 01:01 UTC

Orbital Properties

Epoch

60800.0

MJD

Orbit type

Apollo

Perihelion (q)

0.224

Aphelion (Q)

2.224

Eccentricity (e)

0.817

Inclination (i)

15.6

deg

Orbit period (P)

494.8

Earth MOID

0.00484

U parameter

3.0

Next Earth close approach

Date

2043-04-20

Nominal distance (from Earth center)

0.10468

15659706

Maximum Brightness

20.1

mag

Risk

Object is not in risk list

Object is not in priority list

Physical Properties

Absolute Magnitude (H)

mag

Diameter

170 - 400*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2024-04-16

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

60800.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.224324

1-sigma variation

0.000001

Unit

Eccentricity (e)

Value

0.816766

1-sigma variation

3.561E-7

Unit

Inclination (i)

Value

15.6000

1-sigma variation

1.191E-5

Unit

Long. of Ascending Node (Ω)

Value

214.5390

1-sigma variation

7.332E-6

Unit

Arg. of Perihelion (ω)

Value

135.6930

1-sigma variation

2.600E-5

Unit

Mean Anomaly (M)

Value

238.25945

1-sigma variation

0.00015

Unit

Perihelion distance

Value

0.224338

1-sigma variation

Unit

Aphelion distance

Value

2.224310

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.025230

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.736306

1-sigma variation

Unit

MOID

Value

0.004842

1-sigma variation

Unit

Orbit Period

Value

494.8150

1-sigma variation

Unit

U parameter

Value

3.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	3.24364E-13	2.00883E-13	4.96106E-12	-1.60731E-12	1.40108E-11	-8.56905E-11
e	2.00883E-13	1.26794E-13	3.10832E-12	-1.03406E-12	8.93733E-12	-5.29474E-11
i	4.96106E-12	3.10832E-12	1.41743E-10	-5.32132E-11	2.44263E-10	-1.30886E-9
Ω	-1.60731E-12	-1.03406E-12	-5.32132E-11	5.37623E-11	-1.15094E-10	4.21699E-10
ω	1.40108E-11	8.93733E-12	2.44263E-10	-1.15094E-10	6.76167E-10	-3.68917E-9
M	-8.56905E-11	-5.29474E-11	-1.30886E-9	4.21699E-10	-3.68917E-9	2.26474E-8

Date of computation: 2025-04-17 15:46 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

21.029

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

170 - 400*

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

[-]

Download this part as:

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

354

Unit

Source

[1]

Unobserved

Value

Unit

Source

[1]

Normalized RMS of residuals

Value

0.589359

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2024-04-16.405543

Unit

Source

[2]

Last Observation

Value

2025-04-05.209628

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

143 (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 2024HJ 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	1959-04-25 10:55	4.8	0.0418918	0.0416241	0.0000892
MERCURY	1974-05-06 23:42	8.7	0.0470244	0.0465518	0.0001583
EARTH	1982-04-29 01:02	4.0	0.1527373	0.1524533	0.0000947
MERCURY	1985-03-07 10:09	8.8	0.0322039	0.0321437	0.0000218
MERCURY	1996-01-07 13:02	9.1	0.0367137	0.0364536	0.0000878
EARTH	2001-04-21 14:57	5.0	0.0534757	0.0532156	0.0000867
EARTH	2024-04-26 16:23	< 1 s	0.0856197	0.0856195	0.0000001
EARTH	2043-04-20 06:51	4.3	0.1046787	0.1044616	0.0000724
EARTH	2066-04-26 04:01	6.1	0.0488445	0.0484893	0.0001184
EARTH	2085-04-18 12:09	< 1 min	0.1416764	0.1416374	0.0000130
VENUS	2094-10-24 12:54	3.0	0.0486720	0.0485321	0.0000467
VENUS	2101-08-01 12:48	5.2	0.0428506	0.0426268	0.0000747
EARTH	2108-04-22 10:49	6.0	0.0685363	0.0682262	0.0001034
MERCURY	2111-02-22 01:56	11.7	0.0497669	0.0493256	0.0001478

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
282.68363804	110.46491806	0.00484247	MINIMUM
73.96934325	21.88826880	0.26476828	MINIMUM
355.53845278	238.61936307	0.78920499	SADDLE
356.23354545	60.84797070	1.21330005	SADDLE
178.55233183	68.21322259	1.26222633	SADDLE
180.18981608	248.72663649	3.21771406	MAXIMUM

Download:

MOID Plots

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