Asteroids

2017WE28 help

Last update: 2024-05-02 23:50 UTC

Orbital Properties

Epoch

60400.0

MJD

Orbit type

Apollo

Perihelion (q)

0.813

Aphelion (Q)

1.404

Eccentricity (e)

0.267

Inclination (i)

6.7

deg

Orbit period (P)

426.3

Earth MOID

0.00061

U parameter

7.4

Next Earth close approach

Date

2024-11-25

Nominal distance (from Earth center)

0.04645

6948090

Maximum Brightness

mag

Risk

Object is in risk list

Object is not in priority list

Physical Properties

Absolute Magnitude (H)

26.6

mag

Diameter

13 - 28*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2017-11-27

Observatory

Mt. Lemmon Survey

Orbit Visualiser

Click the button to start Orbit Visualiser

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

60400.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.108543

1-sigma variation

0.000239

Unit

Eccentricity (e)

Value

0.266732

1-sigma variation

0.000307

Unit

Inclination (i)

Value

6.7148

1-sigma variation

0.0074

Unit

Long. of Ascending Node (Ω)

Value

61.1543

1-sigma variation

0.0021

Unit

Arg. of Perihelion (ω)

Value

279.0285

1-sigma variation

0.0067

Unit

Mean Anomaly (M)

Value

209.40751

1-sigma variation

0.73318

Unit

Perihelion distance

Value

0.812859

1-sigma variation

Unit

Aphelion distance

Value

1.404227

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.001512

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.062397

1-sigma variation

Unit

MOID

Value

0.000611

1-sigma variation

Unit

Orbit Period

Value

426.3115

1-sigma variation

Unit

U parameter

Value

7.4

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	5.72403E-8	7.35083E-8	1.77732E-6	-4.95496E-7	1.60286E-6	-1.75413E-4
e	7.35083E-8	9.44056E-8	2.28261E-6	-6.36233E-7	2.05749E-6	-2.25267E-4
i	1.77732E-6	2.28261E-6	5.51907E-5	-1.53829E-5	4.97443E-5	-5.44663E-3
Ω	-4.95496E-7	-6.36233E-7	-1.53829E-5	4.29065E-6	-1.38887E-5	1.51845E-3
ω	1.60286E-6	2.05749E-6	4.97443E-5	-1.38887E-5	4.50283E-5	-4.91197E-3
M	-1.75413E-4	-2.25267E-4	-5.44663E-3	1.51845E-3	-4.91197E-3	5.37557E-1

Date of computation: 2024-04-23 10:08 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

26.618

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

13 - 28*

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 ODIM	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

Unit

Source

[1]

Unobserved

Value

2335

Unit

Source

[1]

Normalized RMS of residuals

Value

0.871042

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2017-11-27.12601

Unit

Source

[2]

Last Observation

Value

2017-12-11.062792

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

33 (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 2017WE28 from 1950 to 2124

Body	Date in UTC	Time uncert. in min	Nominal distance in au	Min. possibile distance in au	Distance uncert. in au
EARTH	1952-10-05 09:10	> 1 w	0.1912184	0.1435805	0.0165762
EARTH	1966-06-01 18:35	811.1	0.0253482	0.0199731	0.0063037
EARTH	1973-05-22 23:05	499.3	0.1874680	0.1617168	0.0085904
EARTH	1974-11-27 00:48	631.3	0.0669008	0.0450111	0.0072977
EARTH	1981-11-13 10:39	158.2	0.1042520	0.1004030	0.0012836
EARTH	2002-06-06 02:31	> 1 d	0.0848323	0.0285090	0.0199372
EARTH	2009-05-28 15:35	1153.8	0.0712465	0.0254303	0.0169056
EARTH	2010-12-03 03:31	898.6	0.1924496	0.1433228	0.0163762
EARTH	2017-11-24 04:43	< 1 min	0.0147556	0.0147054	0.0000167
EARTH	2024-11-25 17:52	1190.0	0.0464451	0.0000176	0.0157553
EARTH	2030-05-25 06:07	315.7	0.1826544	0.1584423	0.0080774
EARTH	2031-11-30 21:12	308.8	0.1322895	0.1176961	0.0048645
EARTH	2037-05-29 00:58	400.9	0.0975384	0.0863195	0.0037605
EARTH	2044-06-01 00:57	1173.9	0.0367051	0.0246906	0.0108037
EARTH	2051-06-01 23:51	1154.7	0.0346866	0.0247929	0.0100969
EARTH	2058-05-30 04:10	661.1	0.0851674	0.0619246	0.0078968
EARTH	2065-05-26 19:10	13.3	0.1540207	0.1483043	0.0019059
EARTH	2066-12-01 16:23	80.0	0.1279869	0.1172738	0.0035729
EARTH	2073-11-28 02:29	783.3	0.0600661	0.0223766	0.0126304
EARTH	2080-11-26 13:50	661.1	0.0344418	0.0057814	0.0100240
EARTH	2087-11-30 16:04	1410.9	0.0963754	0.0406180	0.0186003
EARTH	2093-05-28 09:29	> 1 d	0.1433910	0.0464100	0.0337620
EARTH	2094-12-04 01:09	> 1 d	0.1681375	0.0502851	0.0393309
EARTH	2100-06-01 03:04	> 1 d	0.0824679	0.0275583	0.0447518
EARTH	2107-06-03 07:42	> 1 d	0.0553314	0.0280323	0.0293808
EARTH	2114-06-02 13:24	58.9	0.0667019	0.0551968	0.0038834
EARTH	2121-05-31 05:29	> 1 d	0.1105251	0.0260103	0.0388793
EARTH	2122-12-06 09:15	> 1 d	0.1775306	0.0406844	0.0459304

Download as:

2017WE28

Date in UTC	MJD	σ	Distance ± Width in RE	Stretching in RE/σ	IP	Exp. energy	PS
2039-11-23.901	66115.901	-3.364	1.49 ± 0.001	6.13E4	6.64E-8	7.61E-9	-7.62
2053-11-23.355	71229.355	-3.556	0.38 ± 0.002	8.83E5	2.55E-9	2.92E-10	-9.31
2057-11-23.389	72690.389	-2.503	0.74 ± 0.002	6.95E4	7.21E-7	8.26E-8	-6.91
2067-11-23.879	76342.879	-4.423	1.50 ± 0.002	1.19E4	5.61E-9	6.39E-10	-9.14
2069-11-23.321	77073.321	-3.537	1.28 ± 0.004	2.05E6	7.40E-10	8.47E-11	-10.03


Based on 33 optical observations (of which 0 are rejected as outliers) from 2017/11/27.126 to 2017/12/11.063.
Coordinates are given on the Target Plane.
Unit is one Earth radius, but impact cross section has radius between 1.62 and 1.62 Earth radii.
Coordinates for LOV = EQU scaled= 1 second= F.
AstOD software version= 4.0, Date of computation=20240110 090433.184 UTC.

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