Asteroids

2018DO3

Last update: 2021-09-17 23:50 UTC

Orbital Properties

Epoch

59400.0

MJD

Orbit type

Apollo

Perihelion (q)

0.804

Aphelion (Q)

2.313

Eccentricity (e)

0.484

Inclination (i)

4.2

deg

Orbit period (P)

710.7

days

Earth MOID

0.01143

Next Earth close approach

Date

2021-09-29

Nominal distance (from Earth center)

0.04765

7128298

Maximum Brightness

125.6

Orbit Visualiser

Click the button to start Orbit Visualiser

Risk

Object is in risk list

Object is not in priority list

Physical Properties

Absolute Magnitude (H)

29.4

Diameter

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2018-02-17

Observatory

Mauna Kea

External links

Proper elements

Epoch

Near present day

Near middle of observation arc

Orbit properties

Epoch
Semimajor Axis
Eccentricity (e)
Inclination (i)
Ascending Node (Ω)
Arg. of Perihelion (ω)
Mean Anomaly (M)
Perihelion
Aphelion
Asc. Node-Earth Sep.
Desc. Node-Earth Sep.
MOID
Orbit Period

Value

1-sigma variation

Unit

Epoch

Value

59400.0

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.56

1-sigma variation

0.456156

Unit

Eccentricity (e)

Value

0.484301674822615

1-sigma variation

0.218153

Unit

Inclination (i)

Value

4.18

1-sigma variation

0.606239

Unit

Ascending Node (Ω)

Value

148.39

1-sigma variation

2.426E-2

Unit

Arg. of Perihelion (ω)

Value

286.19

1-sigma variation

6.08129

Unit

Mean Anomaly (M)

Value

292.11

1-sigma variation

290.293

Unit

Perihelion

Value

8.037E-1

1-sigma variation

Unit

Aphelion

Value

2.31

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

6.234E-2

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

3.673E-1

1-sigma variation

Unit

MOID

Value

1.143E-2

1-sigma variation

Unit

Orbit Period

Value

710.69

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	2.08079E-1	9.94646E-2	2.59579E-1	1.09819E-2	-2.73734E0	-1.32419E2
e	9.94646E-2	4.75908E-2	1.22676E-1	5.26942E-3	-1.31512E0	-6.32985E1
i	2.59579E-1	1.22676E-1	3.67525E-1	1.30803E-2	-3.20893E0	-1.65186E2
Ω	1.09819E-2	5.26942E-3	1.30803E-2	5.88388E-4	-1.47388E-1	-6.98884E0
ω	-2.73734E0	-1.31512E0	-3.20893E0	-1.47388E-1	3.69821E1	1.74205E3
M	-1.32419E2	-6.32985E1	-1.65186E2	-6.98884E0	1.74205E3	8.42702E4

Date of computation: 2021-08-24 04:39 UTC

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)

Taxononomy

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

29.388

Unit

mag

Source

[1]

Slope Parameter (G)

Value

0.15**

Unit

mag

Source

[2]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

Unit

Source

[-]

Diameter

Value

Unit

Source

[3]

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

[-]

Sources

No.	Name	Additional
[1]	ESA ODIM	ESA orbit determination and impact monitoring system
[2]	NEODyS	NEO Dynamic Site: https://newton.spacedys.com/neodys2
[3]	Estimation	Estimated from absolute magnitude

**Estimated value

Observational Information

Arc Length
Unobserved

Arc Information

Value

Unit

Source

Arc Length

Value

Unit

days

Source

[1]

Unobserved

Value

1308

Unit

days

Source

[1]

Astrometry Summary

RMS of Residuals
First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

RMS of Residuals

Value

0.0721182

Unit

arcseconds

Source

[1]

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

[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 2018DO3 from 1950 to 2150

Body	Date	MJD	Nominal distance (au)	Min possible distance (au)	Stretching (au)	Width (au)	Close approach probability
EARTH	1950-02-09.51310	33321.5	0.0238880	0.0090834	8.103E3	1.325E-3	8.21E-6
EARTH	1951-12-06.64075	33986.6	0.1922808	0.0000000	4.760E2	1.091E-2	7.46E-5
EARTH	1953-09-29.19955	34649.2	0.0431270	0.0280515	4.284E3	5.025E-3	1.52E-5
EARTH	1985-02-07.64867	46103.6	0.0125142	0.0081354	6.643E1	1.356E-3	1.00E-3
EARTH	1986-11-28.58410	46762.6	0.1916641	0.0076692	6.917E0	1.562E-3	7.21E-3
EARTH	1988-09-25.08737	47429.1	0.0675221	0.0302513	7.051E1	4.720E-3	9.22E-4
EARTH	2018-02-08.83704	58157.8	0.0121823	0.0109361	2.952E-3	2.018E-4	1.00E0
EARTH	2019-12-05.32062	58822.3	0.1929064	0.0592652	4.451E-1	8.235E-3	4.07E-2
EARTH	2021-09-29.00144	59486.0	0.0476497	0.0315097	1.092E1	4.827E-3	5.94E-3
MARS	2046-11-21.14530	68670.1	0.0443857	0.0337692	1.035E2	3.119E-3	8.15E-5
EARTH	2053-02-08.31528	70941.3	0.0111132	0.0062557	1.419E2	1.477E-3	4.69E-4
EARTH	2054-11-28.70314	71599.7	0.1924190	0.0042501	9.583E1	2.060E-3	4.97E-4
EARTH	2056-09-25.06222	72266.1	0.0794929	0.0330882	1.766E3	4.770E-3	3.67E-5
EARTH	2086-02-02.11042	82988.1	0.0632731	0.0037863	9.189E3	2.061E-3	7.25E-6
EARTH	2087-11-11.52136	83635.5	0.1752391	0.0000000	2.988E3	4.587E-3	2.16E-5
EARTH	2089-09-19.37136	84313.4	0.1658748	0.0348978	6.518E3	4.268E-3	9.95E-6
EARTH	2117-02-14.75332	94322.8	0.0577658	0.0055860	2.171E4	1.283E-3	3.07E-6
EARTH	2118-12-12.29464	94988.3	0.1916327	0.0000000	2.161E3	1.020E-2	2.23E-5
EARTH	2120-09-30.95114	95647.0	0.0491947	0.0347560	1.401E4	4.575E-3	4.62E-6

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2018DO3

Date	MJD	σ	σ_imp	Distance ± Width (RE)	Stretching (RE/σ)	IP	Exp. Energy (MT)	PS	TS
2087-02-12.210	83363.210	0.844	0.000	1.18 ± 18.631	8.83E6	4.35E-9	2.01E-10	-9.75	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= 2.0, Date of computation=20201121 040041.516 UTC.

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