Asteroids

434196 2003HG2 help

Last update: 2025-10-17 13:00 UTC

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.920

Aphelion (Q)

1.206

Eccentricity (e)

0.135

Inclination (i)

19.8

deg

Orbit period (P)

400.1

Earth MOID

0.04007

U parameter

0.0

Next Earth close approach

Date

2025-10-27

Nominal distance (from Earth center)

0.04463

6677075

Maximum Brightness

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

21.3

mag

Diameter

150 - 300*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2003-04-24

Observatory

Lowell Observatory-LONEOS

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

61000.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.062586

1-sigma variation

2.893E-9

Unit

Eccentricity (e)

Value

0.134654

1-sigma variation

7.509E-8

Unit

Inclination (i)

Value

19.7798

1-sigma variation

9.044E-6

Unit

Long. of Ascending Node (Ω)

Value

214.2224

1-sigma variation

9.226E-6

Unit

Arg. of Perihelion (ω)

Value

225.2067

1-sigma variation

2.996E-5

Unit

Mean Anomaly (M)

Value

345.76643

1-sigma variation

0.00003

Unit

Perihelion distance

Value

0.919504

1-sigma variation

Unit

Aphelion distance

Value

1.205668

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.145351

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.040955

1-sigma variation

Unit

MOID

Value

0.040069

1-sigma variation

Unit

Orbit Period

Value

400.0778

1-sigma variation

Unit

U parameter

Value

0.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	8.36982E-18	-1.75819E-16	-3.26259E-15	2.35093E-15	-2.29164E-14	-5.62610E-15
e	-1.75819E-16	5.63876E-15	9.94964E-14	-7.78167E-14	9.98517E-13	-3.39107E-13
i	-3.26259E-15	9.94964E-14	8.17882E-11	1.14633E-11	6.96702E-11	-6.76629E-11
Ω	2.35093E-15	-7.78167E-14	1.14633E-11	8.51233E-11	-4.34233E-11	-5.01458E-11
ω	-2.29164E-14	9.98517E-13	6.96702E-11	-4.34233E-11	8.97324E-10	-6.90382E-10
M	-5.62610E-15	-3.39107E-13	-6.76629E-11	-5.01458E-11	-6.90382E-10	6.79799E-10

Date of computation: 2025-10-17 13:00 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

21.27

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

150 - 300*

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

8212

Unit

Source

[1]

Unobserved

Value

1.0

Unit

Source

[1]

Normalized RMS of residuals

Value

0.785566

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2003-04-24.26411

Unit

Source

[2]

Last Observation

Value

2025-10-17.101611

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

202 (6)

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 434196 2003HG2 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	1957-04-11 02:13	< 1 min	0.1883764	0.1883760	0.0000001
EARTH	1967-10-23 01:44	< 1 min	0.0636810	0.0636802	0.0000003
EARTH	1968-04-26 13:33	< 1 min	0.1805407	0.1805404	0.0000001
EARTH	1979-11-10 17:20	< 1 min	0.1815923	0.1815911	0.0000004
EARTH	1980-04-14 00:05	< 1 min	0.1524469	0.1524467	0.0000001
EARTH	1990-10-15 06:14	< 1 min	0.1608280	0.1608267	0.0000004
EARTH	2002-11-01 13:13	< 1 min	0.0848730	0.0848720	0.0000003
EARTH	2003-04-19 19:21	< 1 min	0.1411518	0.1411516	0.0000001
EARTH	2025-10-27 23:11	< 1 min	0.0446335	0.0446333	0.0000001
EARTH	2026-04-22 13:49	< 1 min	0.1529251	0.1529247	0.0000001
EARTH	2048-10-27 15:58	< 1 min	0.0439978	0.0439971	0.0000002
EARTH	2049-04-22 08:16	< 1 min	0.1531964	0.1531956	0.0000003
EARTH	2071-11-01 17:42	< 1 min	0.0824120	0.0824057	0.0000021
EARTH	2072-04-18 23:29	< 1 min	0.1424896	0.1424888	0.0000003
EARTH	2082-10-14 18:24	< 1 min	0.1696914	0.1696834	0.0000027
EARTH	2094-11-10 04:52	< 1 min	0.1769795	0.1769724	0.0000024
EARTH	2095-04-14 18:35	< 1 min	0.1542751	0.1542725	0.0000009
EARTH	2105-10-23 03:23	< 1 min	0.0709779	0.0709728	0.0000017
EARTH	2106-04-28 14:44	< 1 min	0.1834598	0.1834566	0.0000011
EARTH	2118-04-12 15:20	< 1 min	0.1879898	0.1879882	0.0000005

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
318.72466047	292.50754979	0.04006909	MINIMUM
121.62749302	105.67362310	0.13888931	MINIMUM
40.94450584	24.06365240	0.33433104	SADDLE
220.91424148	193.89188100	0.40081416	SADDLE
10.73531716	169.02536876	1.91963263	SADDLE
166.22333448	324.02104307	2.17892655	MAXIMUM

Download:

MOID Plots

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