Asteroids

385186 1994AW1 help

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

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Amor

Perihelion (q)

1.021

Aphelion (Q)

1.189

Eccentricity (e)

0.076

Inclination (i)

24.1

deg

Orbit period (P)

424.3

Earth MOID

0.01821

U parameter

0.0

A₂

11.8

10^-15au/days²

Next Earth close approach

Date

2030-01-09

Nominal distance (from Earth center)

0.18493

27664490

Maximum Brightness

14.4

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

17.6

mag

Diameter

800 - 1800*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

1994-01-11

Observatory

Palomar Mountain

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

1.104997

1-sigma variation

5.634E-10

Unit

Eccentricity (e)

Value

0.075576

1-sigma variation

1.345E-8

Unit

Inclination (i)

Value

24.0995

1-sigma variation

2.764E-6

Unit

Long. of Ascending Node (Ω)

Value

290.3379

1-sigma variation

2.257E-6

Unit

Arg. of Perihelion (ω)

Value

37.1411

1-sigma variation

1.419E-5

Unit

Mean Anomaly (M)

Value

294.57401

1-sigma variation

0.00001

Unit

Perihelion distance

Value

1.021485

1-sigma variation

Unit

Aphelion distance

Value

1.188508

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.018310

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.185376

1-sigma variation

Unit

MOID

Value

0.018214

1-sigma variation

Unit

Orbit Period

Value

424.2677

1-sigma variation

Unit

U parameter

Value

0.0

1-sigma variation

Unit

A₂

Value

11.83488

1-sigma variation

1.49000

Unit

10^-15au/days²

Covariance Matrix

	a	e	i	Ω	ω	M	A₂
a	3.17430E-19	-2.64486E-18	-4.70412E-16	-2.39226E-16	5.93988E-15	-5.64235E-15	7.67394E-10
e	-2.64486E-18	1.80771E-16	6.72861E-15	-4.71054E-16	-1.95042E-14	3.45514E-14	-1.27849E-9
i	-4.70412E-16	6.72861E-15	7.63895E-12	6.08123E-12	-1.32930E-12	-3.37210E-12	-2.10501E-7
Ω	-2.39226E-16	-4.71054E-16	6.08123E-12	5.09370E-12	2.05648E-12	-6.28804E-12	3.21280E-8
ω	5.93988E-15	-1.95042E-14	-1.32930E-12	2.05648E-12	2.01330E-10	-1.89524E-10	1.41871E-5
M	-5.64235E-15	3.45514E-14	-3.37210E-12	-6.28804E-12	-1.89524E-10	1.83745E-10	-1.36399E-5
A₂	7.67394E-10	-1.27849E-9	-2.10501E-7	3.21280E-8	1.41871E-5	-1.36399E-5	2.22009E0

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

[1]

Taxonomy (all)

Value

Unit

Source

[2]

Absolute Magnitude (H)
Slope Parameter (G)

H / G

Value

Unit

Source

Absolute Magnitude (H)

Value

17.609

Unit

mag

Source

[3]

Slope Parameter (G)

Value

0.15**

Unit

mag

Source

[3]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.05 - 0.25

Unit

Source

[4]

Diameter

Value

800 - 1800*

Unit

Source

[4]

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]	EARN	1.) Michaël Marsset et al 2022 AJ 163 165
[2]	EARN	Earth Asteroids Research Node: https://earn.dlr.de
[3]	ESA Aegis	ESA orbit determination and impact monitoring system
[4]	Estimation	Estimated from absolute magnitude

Observational Information

Arc Length
Unobserved
Normalized RMS of residuals

Arc Information

Value

Unit

Source

Arc Length

Value

13614

Unit

Source

[1]

Unobserved

Value

537

Unit

Source

[1]

Normalized RMS of residuals

Value

0.398981

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

1986-12-29.52039

Unit

Source

[2]

Last Observation

Value

2024-04-07.130989

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

2809 (8)

Unit

Source

[1]

Radar Summary

First Observation
Last Observation
Delay (Discarded)
Doppler (Discarded)
Total Optical Observations (Discarded)

Radar

Value

Unit

Source

First Observation

Value

2015-07-20

Unit

Source

[3]

Last Observation

Value

2022-07-07

Unit

Source

[3]

Delay (Discarded)

Value

4 (0)

Unit

Source

[1]

Doppler (Discarded)

Value

0 (0)

Unit

Source

[-]

Total Radar Observations (Discarded)

Value

4 (0)

Unit

Source

[1]

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
[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 385186 1994AW1 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	1950-07-11 02:05	< 1 min	0.0638572	0.0638558	0.0000005
EARTH	1958-01-07 15:38	< 1 min	0.1835626	0.1835626	0.0000000
EARTH	1979-07-16 04:49	< 1 s	0.0850468	0.0850459	0.0000003
EARTH	1986-07-09 18:08	< 1 s	0.1042000	0.1041993	0.0000002
EARTH	1994-01-09 07:58	< 1 s	0.1851864	0.1851864	0.0000000
EARTH	2015-07-15 14:19	< 1 s	0.0650119	0.0650119	0.0000000
EARTH	2022-07-09 13:18	< 1 s	0.1118742	0.1118742	0.0000000
EARTH	2030-01-09 02:49	< 1 s	0.1849257	0.1849256	0.0000000
EARTH	2051-07-17 06:06	< 1 s	0.1121280	0.1121272	0.0000003
EARTH	2058-07-11 07:32	< 1 min	0.0650415	0.0650405	0.0000003
EARTH	2066-01-07 19:16	< 1 min	0.1834118	0.1834118	0.0000000
EARTH	2087-07-17 03:59	< 1 s	0.1066911	0.1066901	0.0000003
EARTH	2094-07-10 19:05	< 1 s	0.0824934	0.0824925	0.0000003
EARTH	2102-01-09 23:58	< 1 s	0.1834916	0.1834915	0.0000000
EARTH	2123-07-16 21:34	< 1 s	0.0663926	0.0663922	0.0000002

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
325.64823248	188.49841469	0.02007599	MINIMUM
136.71618562	5.08215964	0.18373489	MINIMUM
51.87511202	281.81866525	0.43116129	SADDLE
231.34631368	91.96247072	0.47421028	SADDLE
19.64683864	64.91115002	1.98754749	SADDLE
158.74569749	203.76072373	2.19358196	MAXIMUM

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MOID Plots

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