Asteroids

2024HC help

Last update: 2024-05-03 07:31 UTC

Orbital Properties

Epoch

60400.0

MJD

Orbit type

Aten

Perihelion (q)

0.852

Aphelion (Q)

1.028

Eccentricity (e)

0.094

Inclination (i)

0.9

deg

Orbit period (P)

332.9

Earth MOID

0.00808

U parameter

6.1

Next Earth close approach

Date

2034-11-18

Nominal distance (from Earth center)

0.13212

19765122

Maximum Brightness

39.6

mag

Risk

Object is in risk list

Object is not in priority list

Physical Properties

Absolute Magnitude (H)

27.3

mag

Diameter

9 - 21*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2024-04-16

Observatory

Mt. Lemmon Survey

Orbit Visualiser

Click the button to start Orbit Visualiser

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

60400.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

0.939995

1-sigma variation

0.000027

Unit

Eccentricity (e)

Value

0.093766

1-sigma variation

0.000039

Unit

Inclination (i)

Value

0.9232

1-sigma variation

0.0004

Unit

Long. of Ascending Node (Ω)

Value

149.1492

1-sigma variation

0.0063

Unit

Arg. of Perihelion (ω)

Value

257.7821

1-sigma variation

0.0027

Unit

Mean Anomaly (M)

Value

137.63458

1-sigma variation

0.00419

Unit

Perihelion distance

Value

0.851855

1-sigma variation

Unit

Aphelion distance

Value

1.028135

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.037537

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.097297

1-sigma variation

Unit

MOID

Value

0.008081

1-sigma variation

Unit

Orbit Period

Value

332.8793

1-sigma variation

Unit

U parameter

Value

6.1

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	7.26903E-10	-1.06245E-9	-9.47678E-9	1.44236E-7	1.04716E-8	-1.10603E-7
e	-1.06245E-9	1.55290E-9	1.38514E-8	-2.10861E-7	-1.52691E-8	1.61666E-7
i	-9.47678E-9	1.38514E-8	1.23687E-7	-1.84206E-6	-1.66709E-7	1.43234E-6
Ω	1.44236E-7	-2.10861E-7	-1.84206E-6	4.02742E-5	-7.05674E-6	-2.49014E-5
ω	1.04716E-8	-1.52691E-8	-1.66709E-7	-7.05674E-6	7.31854E-6	7.13305E-7
M	-1.10603E-7	1.61666E-7	1.43234E-6	-2.49014E-5	7.13305E-7	1.75896E-5

Date of computation: 2024-05-02 11:58 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

27.262

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

9 - 21*

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 ODIM	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

0.618959

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2024-04-16.292215

Unit

Source

[2]

Last Observation

Value

2024-05-01.28074

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

46 (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

[3]

Last Observation

Value

Unit

Source

[3]

Delay (Discarded)

Value

0 (0)

Unit

Source

[1]

Doppler (Discarded)

Value

0 (0)

Unit

Source

[1]

Total Radar Observations (Discarded)

Value

0 (0)

Unit

Source

[1]

Note: The ASCII file is in a format suitable for Orbfit input.

Sources

No.	Name	Additional
[1]	ESA ODIM	ESA orbit determination and impact monitoring system
[2]	MPC	Minor Planet Center: https://www.minorplanetcenter.net
[3]	JPL Radar Observations	Jet Propulsion Laboratory: https://ssd.jpl.nasa.gov/dat/radar_data_ast.txt

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 2024HC from 1950 to 2124

Body	Date in UTC	Time uncert. in min	Nominal distance in au	Min. possibile distance in au	Distance uncert. in au
EARTH	1954-02-01 06:12	> 1 mo	0.0810117	0.0244122	23.9388586
EARTH	1954-06-01 18:40	> 1 mo	0.0191720	0.0157389	11.6351520
EARTH	1965-03-13 02:43	> 1 mo	0.0388212	0.0000417	3.0922531
EARTH	1965-09-08 10:01	> 1 mo	0.1063249	0.0539012	0.9806055
EARTH	1977-03-12 04:06	> 1 d	0.0534607	0.0006268	0.6100799
EARTH	1977-09-18 07:30	> 1 mo	0.1096012	0.0632743	0.1554879
EARTH	1989-12-25 06:49	> 1 w	0.1017833	0.0714200	0.0101678
EARTH	1990-06-20 13:38	629.5	0.0311445	0.0158582	0.0253873
EARTH	2001-03-16 16:15	> 1 d	0.1028176	0.0011099	0.1709919
EARTH	2001-10-01 08:01	> 1 mo	0.1208013	0.0775694	0.0311181
EARTH	2013-01-20 10:31	> 1 w	0.0856175	0.0780914	0.0025493
EARTH	2013-06-11 15:37	> 1 d	0.0157720	0.0154678	0.0005413
EARTH	2024-04-04 16:10	1.1	0.0193919	0.0193639	0.0000093
EARTH	2034-11-18 12:22	> 1 d	0.1321217	0.1308084	0.0004378
EARTH	2035-06-11 15:22	63.3	0.1449096	0.1360690	0.0029476
EARTH	2045-03-11 03:28	6.4	0.0540529	0.0427075	0.0037928
EARTH	2045-09-02 02:13	> 1 d	0.1100660	0.1062537	0.0012730
EARTH	2056-03-10 09:05	454.8	0.0433618	0.0078524	0.0185032
EARTH	2056-09-02 08:45	> 1 w	0.1056969	0.0860756	0.0065826
EARTH	2067-12-29 12:10	> 1 mo	0.0994926	0.0262704	0.0614777
EARTH	2068-06-14 09:38	> 1 w	0.0276426	0.0127176	0.1339089
EARTH	2078-10-25 15:37	> 1 mo	0.1363468	0.1270318	0.0259706
EARTH	2089-03-16 09:14	> 1 mo	0.0163973	0.0099791	2.7889126
EARTH	2089-08-31 22:07	> 1 mo	0.0954742	0.0547640	1.1219505
EARTH	2101-12-06 23:57	> 1 mo	0.1145288	0.0411960	24.3744844
EARTH	2102-06-24 19:13	> 1 mo	0.0836338	0.0077353	121.8750496
EARTH	2114-01-15 06:00	> 1 mo	0.0882934	0.0268213	46.8120543
EARTH	2114-06-19 22:08	> 1 mo	0.0100846	0.0089195	40.8550134
EARTH	2124-04-30 02:10	> 1 mo	0.0235501	0.0227658	328.5975797

Download as:

2024HC

Date in UTC	MJD	σ	Distance ± Width in RE	Stretching in RE/σ	IP	Exp. energy	PS
2085-06-22.067	82763.067	2.869	4.47 ± 0.009	1.79E6	2.93E-8	1.20E-9	-8.91
2095-06-13.631	86406.631	0.734	5.37 ± 0.000	9.89E6	3.44E-7	1.41E-8	-7.91
2101-06-28.731	88612.731	0.593	4.13 ± 0.000	2.62E7	1.53E-7	6.29E-9	-8.29
2107-06-08.380	90783.380	0.517	0.28 ± 0.000	2.96E10	1.39E-10	5.70E-12	-11.37
2118-05-24.901	94786.901	4.077	5.60 ± 0.051	3.34E5	1.28E-9	5.25E-11	-10.46
2118-06-16.670	94809.670	-0.610	4.64 ± 0.000	2.19E7	1.09E-7	4.48E-9	-8.53
2120-06-24.391	95548.391	2.837	4.31 ± 0.000	4.98E7	1.48E-9	6.10E-11	-10.40


Based on 46 optical observations (of which 0 are rejected as outliers) from 2024/04/16.292 to 2024/05/01.281.
Coordinates are given on the Target Plane.
Unit is one Earth radius, but impact cross section has radius between 5.90 and 5.90 Earth radii.
Coordinates for LOV = EQU scaled= 1 second= F.
Aegis software version= 4.0, Date of computation=20240502 125259.971 UTC.

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