Asteroids

2021GW3

Last update: 2021-04-13 13:07 UTC

Orbital Properties

Epoch

59400.0

MJD

Orbit type

Apollo

Perihelion (q)

0.784

Aphelion (Q)

1.859

Eccentricity (e)

0.407

Inclination (i)

1.1

deg

Orbit period (P)

555

days

Earth MOID

0.00292

Next Earth close approach

Date

2049-10-30

Nominal distance (from Earth center)

0.08124

12154016

Maximum Brightness

126

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)

28.5

Diameter

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2021-04-07

Observatory

Pan-STARRS 1, Haleakala

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

1.32

1-sigma variation

7.69719E-4

Unit

Eccentricity (e)

Value

0.406600457052614

1-sigma variation

4.88149E-4

Unit

Inclination (i)

Value

1.1

1-sigma variation

1.296E-3

Unit

Ascending Node (Ω)

Value

20.99

1-sigma variation

5.604E-4

Unit

Arg. of Perihelion (ω)

Value

95.87

1-sigma variation

6.412E-3

Unit

Mean Anomaly (M)

Value

95.4

1-sigma variation

9.561E-2

Unit

Perihelion

Value

7.843E-1

1-sigma variation

Unit

Aphelion

Value

1.86

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

1.541E-1

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

5.580E-2

1-sigma variation

Unit

MOID

Value

2.919E-3

1-sigma variation

Unit

Orbit Period

Value

554.96

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	5.92467E-7	3.74173E-7	9.50602E-7	-3.15287E-7	5.85655E-9	-7.35902E-5
e	3.74173E-7	2.38289E-7	5.83327E-7	-1.86996E-7	-2.81312E-7	-4.64774E-5
i	9.50602E-7	5.83327E-7	1.67975E-6	-6.33093E-7	2.48068E-6	-1.18060E-4
Ω	-3.15287E-7	-1.86996E-7	-6.33093E-7	3.14070E-7	-1.81881E-6	3.91519E-5
ω	5.85655E-9	-2.81312E-7	2.48068E-6	-1.81881E-6	4.11177E-5	-5.33480E-7
M	-7.35902E-5	-4.64774E-5	-1.18060E-4	3.91519E-5	-5.33480E-7	9.14064E-3

Date of computation: 2021-04-10 13:47 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

28.487

Unit

mag

Source

[1]

Slope Parameter (G)

Value

0.15**

Unit

mag

Source

[1]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

Unit

Source

[-]

Diameter

Value

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

[-]

Sources

No.	Name	Additional
[1]	ESA ODIM	ESA orbit determination and impact monitoring system
[2]	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

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

0.614521

Unit

arcseconds

Source

[1]

First Observation

Value

2021-04-07.414483

Unit

Source

[2]

Last Observation

Value

2021-04-10.23363

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

12 (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 2021GW3 from 1950 to 2150

Body	Date	MJD	Nominal distance (au)	Min possible distance (au)	Stretching (au)	Width (au)	Close approach probability
EARTH	1952-04-02.36823	34104.4	0.0051135	0.0033257	5.608E-2	4.550E-7	1.00E0
MARS	1952-06-24.76984	34187.8	0.0088925	0.0035785	5.036E-2	3.142E-6	3.31E-1
EARTH	1955-03-31.34557	35197.3	0.0347495	0.0031843	2.747E-1	1.745E-6	2.43E-1
EARTH	1958-03-23.18510	36285.2	0.0909662	0.0031755	3.298E-1	2.635E-6	2.02E-1
EARTH	1961-03-06.68921	37364.7	0.1438722	0.0031191	2.549E-1	5.296E-6	2.62E-1
EARTH	1964-02-17.49378	38442.5	0.1793134	0.0031400	1.450E-1	7.945E-6	4.60E-1
EARTH	1967-02-01.36409	39522.4	0.1988520	0.0031272	6.154E-2	9.309E-6	5.03E-1
EARTH	1973-01-03.30010	41685.3	0.1985399	0.0030922	5.838E-2	1.407E-5	5.04E-1
EARTH	1975-12-19.63921	42765.6	0.1789131	0.0030982	1.156E-1	1.326E-5	5.30E-1
EARTH	1978-12-01.63380	43843.6	0.1438292	0.0058053	1.781E-1	1.187E-5	3.75E-1
EARTH	1981-11-15.64986	44923.6	0.0933177	0.0058281	1.918E-1	9.513E-6	3.48E-1
EARTH	1984-11-07.59558	46011.6	0.0410610	0.0058343	1.216E-1	7.965E-6	5.48E-1
EARTH	1987-11-05.37886	47104.4	0.0106791	0.0058843	4.146E-2	7.381E-6	1.00E0
EARTH	1990-11-11.18721	48206.2	0.0656846	0.0058468	4.148E-2	8.486E-6	1.00E0
EARTH	1993-11-24.25362	49315.3	0.1238327	0.0058382	2.920E-2	1.062E-5	9.35E-1
EARTH	1996-12-11.85079	50428.9	0.1656634	0.1088874	1.569E-2	1.205E-5	8.65E-1
EARTH	1999-12-28.07840	51540.1	0.1893663	0.1668164	7.072E-3	1.195E-5	7.51E-1
EARTH	2009-02-10.92201	54872.9	0.1852667	0.1821575	1.031E-3	1.030E-5	1.00E0
EARTH	2012-03-02.13883	55988.1	0.1499057	0.1436257	2.052E-3	7.006E-6	1.00E0
EARTH	2015-03-22.00503	57103.0	0.0920306	0.0561320	9.645E-3	3.263E-6	1.00E0
EARTH	2018-03-30.51308	58207.5	0.0287717	0.0030245	1.632E-2	2.042E-6	1.00E0
EARTH	2021-04-02.28227	59306.3	0.0051151	0.0050989	6.337E-6	1.396E-7	1.00E0
MARS	2042-10-03.18687	67160.2	0.0220794	0.0057214	8.093E-2	5.640E-6	2.05E-1
EARTH	2049-10-30.93787	69744.9	0.0812446	0.0072305	1.628E-1	6.684E-6	4.10E-1
EARTH	2052-11-29.54549	70870.5	0.1338206	0.0072284	1.130E-1	1.099E-5	5.90E-1
EARTH	2059-03-16.07356	73168.1	0.1156708	0.0028379	1.026E-1	4.992E-6	6.37E-1
EARTH	2062-04-09.54452	74288.5	0.1003924	0.0028098	1.008E-1	1.933E-6	6.62E-1
MARS	2082-04-03.08529	81587.1	0.0435755	0.0054943	1.201E-1	5.942E-6	1.38E-1
EARTH	2090-11-03.06450	84723.1	0.0420513	0.0073284	2.444E-1	6.892E-6	2.73E-1
EARTH	2093-12-04.32832	85850.3	0.1441979	0.0073545	5.283E-2	1.116E-5	6.76E-1
EARTH	2100-03-06.58914	88133.6	0.1435507	0.0026239	1.086E-1	5.063E-6	5.87E-1
EARTH	2103-04-07.19996	89260.2	0.0369265	0.0025985	2.809E-1	9.783E-7	2.38E-1
EARTH	2131-11-05.33954	99699.3	0.0367532	0.0075292	1.076E0	7.787E-6	6.20E-2
EARTH	2134-12-09.36179	100829.4	0.1515377	0.0024587	8.095E-2	1.189E-5	6.00E-1
EARTH	2141-03-15.91172	103117.9	0.1213270	0.0023753	1.408E0	1.865E-6	4.74E-2
EARTH	2144-04-09.59716	104238.6	0.0753391	0.0023788	2.458E0	3.797E-7	2.72E-2

Download as:

2021GW3

Date	MJD	σ	σ_imp	Distance ± Width (RE)	Stretching (RE/σ)	IP	Exp. Energy (MT)	PS	TS
2109-04-03.879	91448.879	-0.902	0.000	0.30 ± 0.179	1.54E8	4.89E-9	5.98E-11	-10.26	0


Based on 12 optical observations (of which 0 are rejected as outliers) from 2021/04/07.414 to 2021/04/10.234.
Coordinates are given on the Target Plane.
Unit is one Earth radius, but impact cross section has radius between 1.44 and 1.44 Earth radii. Coordinates for LOV = EQU scaled= 1 second= F.
AstOD software version= 2.0, Date of computation=20210410 160343.874 UTC.

Download this part as:

Download Impactor Table as: