Asteroids

350462 1998KG3 help

Last update: 2025-09-10 00:30 UTC

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Amor

Perihelion (q)

1.023

Aphelion (Q)

1.295

Eccentricity (e)

0.117

Inclination (i)

5.5

deg

Orbit period (P)

455.8

Earth MOID

0.09617

U parameter

0.0

A₂

-70.2

10^-15au/days²

Next Earth close approach

Date

2028-04-16

Nominal distance (from Earth center)

0.16625

24870930

Maximum Brightness

19.6

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

22.1

mag

Diameter

100 - 230*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

1998-05-22

Observatory

Steward Observatory, Kitt Peak-Spacewatch

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

1.159143

1-sigma variation

1.891E-9

Unit

Eccentricity (e)

Value

0.117085

1-sigma variation

8.476E-8

Unit

Inclination (i)

Value

5.5081

1-sigma variation

5.795E-6

Unit

Long. of Ascending Node (Ω)

Value

207.8196

1-sigma variation

1.380E-5

Unit

Arg. of Perihelion (ω)

Value

267.9593

1-sigma variation

4.508E-5

Unit

Mean Anomaly (M)

Value

108.20258

1-sigma variation

0.00004

Unit

Perihelion distance

Value

1.023425

1-sigma variation

Unit

Aphelion distance

Value

1.294861

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.142584

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.142805

1-sigma variation

Unit

MOID

Value

0.096169

1-sigma variation

Unit

Orbit Period

Value

455.8310

1-sigma variation

Unit

U parameter

Value

0.0

1-sigma variation

Unit

A₂

Value

-70.17954

1-sigma variation

5.82974

Unit

10^-15au/days²

Covariance Matrix

	a	e	i	Ω	ω	M	A₂
a	3.57720E-18	-6.01267E-17	6.42366E-16	9.97677E-17	4.24325E-14	-4.17067E-14	6.71307E-9
e	-6.01267E-17	7.18496E-15	-2.13670E-13	-7.30680E-14	-3.00955E-12	2.37016E-12	1.64226E-7
i	6.42366E-16	-2.13670E-13	3.35858E-11	2.55808E-11	3.30612E-11	-3.66061E-11	-1.80520E-5
Ω	9.97677E-17	-7.30680E-14	2.55808E-11	1.90540E-10	-1.68194E-10	-1.41535E-11	-1.20868E-5
ω	4.24325E-14	-3.00955E-12	3.30612E-11	-1.68194E-10	2.03228E-9	-1.57726E-9	3.62421E-5
M	-4.17067E-14	2.37016E-12	-3.66061E-11	-1.41535E-11	-1.57726E-9	1.37962E-9	-5.10126E-5
A₂	6.71307E-9	1.64226E-7	-1.80520E-5	-1.20868E-5	3.62421E-5	-5.10126E-5	3.39859E1

Date of computation: 2025-09-10 00:30 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

22.073

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

100 - 230*

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

9131

Unit

Source

[1]

Unobserved

Value

876

Unit

Source

[1]

Normalized RMS of residuals

Value

0.497923

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

1998-05-22.36028

Unit

Source

[2]

Last Observation

Value

2023-05-22.282299

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

316 (4)

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 350462 1998KG3 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	1998-04-28 01:24	< 1 min	0.1943974	0.1943970	0.0000001
EARTH	2003-04-15 01:35	< 1 min	0.1646196	0.1646192	0.0000001
EARTH	2008-04-04 00:35	< 1 min	0.1415084	0.1415081	0.0000001
EARTH	2013-03-29 12:32	< 1 min	0.1294232	0.1294229	0.0000001
EARTH	2018-03-30 07:10	< 1 min	0.1298883	0.1298881	0.0000001
EARTH	2023-04-06 05:26	< 1 min	0.1426527	0.1426525	0.0000001
EARTH	2028-04-16 19:55	< 1 min	0.1662519	0.1662515	0.0000001
EARTH	2033-04-30 18:43	< 1 min	0.1959118	0.1959113	0.0000001
EARTH	2088-10-13 01:16	3.1	0.1842957	0.1842917	0.0000013
EARTH	2093-10-27 04:06	3.1	0.1542965	0.1542922	0.0000015
EARTH	2098-11-06 18:08	2.7	0.1334301	0.1334261	0.0000013
EARTH	2103-11-12 12:40	2.2	0.1253048	0.1253016	0.0000010
EARTH	2108-11-09 16:30	1.6	0.1298426	0.1298403	0.0000008
EARTH	2113-11-02 00:22	1.1	0.1470835	0.1470821	0.0000005
EARTH	2118-10-20 15:11	< 1 min	0.1752031	0.1752020	0.0000004

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
321.92980458	331.42398544	0.09645932	MINIMUM
41.91914914	59.54572149	0.09652495	MINIMUM
2.01863598	15.58090699	0.10405043	SADDLE
181.72985596	195.28211634	0.30002414	SADDLE
2.12747684	195.69434089	2.03680406	SADDLE
181.55772481	15.12041216	2.27643966	MAXIMUM

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MOID Plots

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