Asteroids

2018DO3 help

Last update: 2025-06-12 11:40 UTC

Orbital Properties

Epoch

60800.0

MJD

Orbit type

Apollo

Perihelion (q)

0.803

Aphelion (Q)

2.313

Eccentricity (e)

0.485

Inclination (i)

4.2

deg

Orbit period (P)

710.3

Earth MOID

0.01099

U parameter

9.0

Next Earth close approach

Date

2053-02-08

Nominal distance (from Earth center)

0.01111

1662550

Maximum Brightness

21.9

mag

Risk

Object is in risk list

Object is not in priority list

Physical Properties

Absolute Magnitude (H)

29.4

mag

Diameter

3 - 8*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2018-02-17

Observatory

Maunakea

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

1.557978

1-sigma variation

0.715555

Unit

Eccentricity (e)

Value

0.484501

1-sigma variation

0.273821

Unit

Inclination (i)

Value

4.1710

1-sigma variation

1.3795

Unit

Long. of Ascending Node (Ω)

Value

148.2227

1-sigma variation

14.0658

Unit

Arg. of Perihelion (ω)

Value

286.4169

1-sigma variation

6.4296

Unit

Mean Anomaly (M)

Value

281.70638

1-sigma variation

731.44100

Unit

Perihelion distance

Value

0.803136

1-sigma variation

Unit

Aphelion distance

Value

2.312819

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.059859

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.370785

1-sigma variation

Unit

MOID

Value

0.010989

1-sigma variation

Unit

Orbit Period

Value

710.2974

1-sigma variation

Unit

U parameter

Value

9.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	5.12019E-1	1.95877E-1	-9.75068E-1	-1.00648E1	-4.55149E0	-5.23386E2
e	1.95877E-1	7.49781E-2	-3.74437E-1	-3.85075E0	-1.74740E0	-2.00223E2
i	-9.75068E-1	-3.74437E-1	1.90294E0	1.91791E1	8.86891E0	9.96634E2
Ω	-1.00648E1	-3.85075E0	1.91791E1	1.97848E2	8.95220E1	1.02882E4
ω	-4.55149E0	-1.74740E0	8.86891E0	8.95220E1	4.13398E1	4.65218E3
M	-5.23386E2	-2.00223E2	9.96634E2	1.02882E4	4.65218E3	5.35006E5

Date of computation: 2025-06-12 11:40 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

29.433

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

3 - 8*

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

0.2

Unit

Source

[1]

Unobserved

Value

2692

Unit

Source

[1]

Normalized RMS of residuals

Value

0.0721182

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2018-02-17.28367

Unit

Source

[2]

Last Observation

Value

2018-02-17.46929

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

63 (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

[-]

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 2018DO3 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	1950-02-09 12:34	> 1 mo	0.0239956	0.0090573	6536.3407423
EARTH	1951-12-06 15:52	> 1 mo	0.1922772	0.1362140	218.7677472
EARTH	1953-09-29 04:56	> 1 mo	0.0431280	0.0280479	64.0162747
EARTH	1985-02-07 15:33	> 1 mo	0.0125140	0.0081374	14.0712766
EARTH	1986-11-28 14:01	> 1 mo	0.1916642	0.1280184	4.7933817
EARTH	1988-09-25 02:05	> 1 mo	0.0675213	0.0300314	51.2088278
EARTH	2018-02-08 20:04	> 1 d	0.0121823	0.0036613	0.0028534
EARTH	2019-12-05 07:41	> 1 mo	0.1929064	0.1677918	0.0291401
EARTH	2021-09-29 00:01	> 1 mo	0.0476498	0.0315011	2.7531165
MARS	2046-11-21 03:28	> 1 mo	0.0443861	0.0337636	23.5700950
EARTH	2053-02-08 07:33	> 1 mo	0.0111138	0.0062870	36.0293957
EARTH	2054-11-28 16:47	> 1 mo	0.1924180	0.1338624	63.1287798
EARTH	2056-09-25 01:26	> 1 mo	0.0795147	0.0331830	1360.0824991
EARTH	2086-02-02 02:08	> 1 mo	0.0634139	0.0023499	8740.6110030
EARTH	2087-11-11 11:46	> 1 mo	0.1751949	0.0380889	2745.8784153
EARTH	2089-09-19 08:45	> 1 mo	0.1659716	0.0337612	6019.2682377
EARTH	2117-02-14 18:38	> 1 mo	0.0580967	0.0050455	20480.3464001
EARTH	2118-12-12 08:27	> 1 mo	0.1916094	0.1068007	1449.6533825
EARTH	2120-09-30 23:15	> 1 mo	0.0491567	0.0346786	2335.4763206

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
41.08358583	36.76800163	0.01098913	MINIMUM
316.85300420	265.53755238	0.04607457	MINIMUM
358.25510672	330.05664233	0.19289886	SADDLE
179.53889140	151.98367085	1.30281554	SADDLE
358.89266081	151.13794170	1.81637471	SADDLE
179.70658526	332.08885128	3.29662668	MAXIMUM

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MOID Plots

Click on the images to zoom-in and zoom-out

Level lines of the squared distance function

2018DO3

Date in UTC	MJD	σ	σ_imp	Distance ± Width in RE	Stretching in RE/σ	IP	Exp. energy	PS	TS
2040-02-15.044	66199.044	1.215	0.000	1.10 ± 39.820	8.80E6	1.25E-9	7.68E-10	-8.73	0
2087-02-11.758	83362.758	0.846	0.000	0.23 ± 12.765	8.32E6	3.72E-9	1.72E-10	-9.77	0


Based on 63 optical observations (of which 0 are rejected as outliers) from 2018/02/17.284 to 2018/02/17.469.
Coordinates are given on the Target Plane.
Unit is one Earth radius, but impact cross section has radius between 1.18 and 1.18 Earth radii.
Coordinates for LOV = EQU scaled= 1 second= F.
AstOD software version= 4.0, Date of computation=20250305 091111.969 UTC.

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