Asteroids

2017WT28 help

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

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Aten

Perihelion (q)

0.781

Aphelion (Q)

1.018

Eccentricity (e)

0.132

Inclination (i)

5.8

deg

Orbit period (P)

311.7

Earth MOID

0.00148

U parameter

5.9

Next Earth close approach

Date

2030-02-09

Nominal distance (from Earth center)

0.19558

29259069

Maximum Brightness

27.8

mag

Risk

Object is in risk list

Physical Properties

Absolute Magnitude (H)

28.2

mag

Diameter

6 - 14*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2017-11-28

Observatory

Catalina Sky Survey

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

0.899686

1-sigma variation

0.000018

Unit

Eccentricity (e)

Value

0.131522

1-sigma variation

0.000037

Unit

Inclination (i)

Value

5.7652

1-sigma variation

0.0017

Unit

Long. of Ascending Node (Ω)

Value

242.7743

1-sigma variation

0.0019

Unit

Arg. of Perihelion (ω)

Value

36.1239

1-sigma variation

0.0036

Unit

Mean Anomaly (M)

Value

263.28337

1-sigma variation

0.09778

Unit

Perihelion distance

Value

0.781357

1-sigma variation

Unit

Aphelion distance

Value

1.018014

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.215093

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.002064

1-sigma variation

Unit

MOID

Value

0.001477

1-sigma variation

Unit

Orbit Period

Value

311.6984

1-sigma variation

Unit

U parameter

Value

5.9

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	3.35820E-10	-6.77138E-10	-3.13173E-8	-3.44674E-8	-6.56171E-8	-1.79178E-6
e	-6.77138E-10	1.36538E-9	6.31486E-8	6.95003E-8	1.32316E-7	3.61288E-6
i	-3.13173E-8	6.31486E-8	2.92069E-6	3.21445E-6	6.11978E-6	1.67093E-4
Ω	-3.44674E-8	6.95003E-8	3.21445E-6	3.53833E-6	6.73569E-6	1.83899E-4
ω	-6.56171E-8	1.32316E-7	6.11978E-6	6.73569E-6	1.28248E-5	3.50096E-4
M	-1.79178E-6	3.61288E-6	1.67093E-4	1.83899E-4	3.50096E-4	9.56009E-3

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

[-]

Taxonomy (all)

Value

Unit

Source

[-]

Absolute Magnitude (H)
Slope Parameter (G)

H / G

Value

Unit

Source

Absolute Magnitude (H)

Value

28.168

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

6 - 14*

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

[-]

Download this part as:

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

Unit

Source

[1]

Unobserved

Value

2844

Unit

Source

[1]

Normalized RMS of residuals

Value

0.587103

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2017-11-27.26174

Unit

Source

[2]

Last Observation

Value

2017-12-16.265521

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

28 (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 2017WT28 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	1963-02-27 02:47	1229.5	0.1505288	0.0989617	0.0403189
EARTH	1970-01-15 09:59	> 1 w	0.0934696	0.0822926	0.0077898
EARTH	1976-11-27 15:33	436.2	0.0162118	0.0108031	0.0018117
EARTH	1977-04-24 18:36	> 1 d	0.1538468	0.1519275	0.0006571
EARTH	1984-01-11 08:51	625.3	0.0898974	0.0888875	0.0003404
EARTH	1991-02-23 10:48	19.4	0.1383454	0.1382416	0.0000346
EARTH	2010-11-22 14:56	20.8	0.0666202	0.0609612	0.0018867
EARTH	2011-05-18 00:17	> 1 d	0.1815393	0.1798538	0.0005720
EARTH	2017-11-25 10:46	< 1 min	0.0035680	0.0035650	0.0000010
EARTH	2018-04-11 00:38	15.2	0.1618217	0.1616998	0.0000406
EARTH	2024-01-22 19:34	529.1	0.0930200	0.0919745	0.0003601
EARTH	2030-02-09 11:54	31.9	0.1955848	0.1898080	0.0019348
EARTH	2046-11-21 22:39	188.4	0.0367930	0.0276968	0.0030351
EARTH	2047-04-24 17:56	> 1 d	0.1763889	0.1733453	0.0010369
EARTH	2052-11-28 15:20	> 1 d	0.0241378	0.0074463	0.0057079
EARTH	2053-04-03 04:41	> 1 d	0.1534645	0.1453899	0.0028760
EARTH	2059-02-08 15:11	736.2	0.1154794	0.0973585	0.0088000
EARTH	2075-11-21 15:32	> 1 d	0.0436652	0.0027926	0.0544119
EARTH	2076-04-24 19:30	> 1 mo	0.1791465	0.1541117	0.0186369
EARTH	2081-12-24 13:38	> 1 w	0.0733233	0.0477938	0.0313466
EARTH	2088-02-11 01:40	> 1 d	0.1596421	0.0972075	0.1332008
EARTH	2104-11-21 07:10	> 1 d	0.0772922	0.0040090	0.2536243
EARTH	2105-05-04 00:53	> 1 mo	0.1892130	0.1684978	0.0745177
EARTH	2110-12-10 15:59	> 1 w	0.0528088	0.0119252	0.0306512
EARTH	2111-03-16 13:01	> 1 w	0.1359083	0.1082471	0.0184249
EARTH	2117-02-11 12:03	679.9	0.1361685	0.0968980	0.1585265

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
138.56259027	320.59144066	0.00145344	MINIMUM
8.58360714	186.44128035	0.24223846	SADDLE
1.46419636	358.15128735	1.76420180	SADDLE
179.44619663	176.09999453	2.03341262	MAXIMUM

Download:

MOID Plots

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

Level lines of the squared distance function

2017WT28

Date in UTC	MJD	σ	Distance ± Width in RE	Stretching in RE	IP	Impact energy	PS
2083-11-24.543	82187.543	-4.846	2.42 ± 0.003	4.29E4	2.62E-10	1.24E-2	-11.36
2089-11-23.871	84378.871	-2.484	2.61 ± 0.001	6.94E4	5.80E-7	1.24E-2	-8.05
2101-11-24.618	88761.618	-0.590	1.88 ± 0.008	2.93E6	4.49E-7	1.24E-2	-8.23
2104-11-24.504	89857.504	-0.348	1.06 ± 0.000	4.27E5	4.38E-6	1.24E-2	-7.26
2104-11-24.688	89857.688	1.469	2.28 ± 0.001	5.69E1	6.80E-3	1.24E-2	-4.07
2104-11-24.701	89857.701	3.833	1.77 ± 0.001	4.24E1	2.47E-5	1.25E-2	-6.51
2105-11-24.335	90222.335	1.137	1.81 ± 0.001	8.24E4	1.02E-5	1.25E-2	-6.90
2107-11-24.659	90952.659	1.680	2.31 ± 0.003	1.69E5	2.75E-6	1.25E-2	-7.48
2108-11-24.130	91318.130	1.903	1.68 ± 0.003	2.57E5	1.09E-6	1.25E-2	-7.88
2108-11-24.138	91318.138	3.519	1.10 ± 0.002	3.87E5	1.04E-8	1.24E-2	-9.90
2108-11-24.390	91318.390	-1.854	2.24 ± 0.003	4.23E4	5.98E-6	1.24E-2	-7.14
2110-11-25.036	92049.036	0.312	2.25 ± 0.001	6.93E3	1.64E-4	1.24E-2	-5.72
2111-11-24.903	92413.903	1.430	1.13 ± 0.003	4.61E5	1.53E-6	1.24E-2	-7.75
2111-11-24.919	92413.919	1.409	2.53 ± 0.002	1.09E6	2.66E-7	1.24E-2	-8.51
2112-11-24.206	92779.206	0.832	0.86 ± 0.029	3.69E5	4.08E-6	1.25E-2	-7.33
2112-11-24.220	92779.220	4.296	2.43 ± 0.001	1.41E5	6.51E-10	1.24E-2	-11.13
2112-11-24.234	92779.234	0.785	0.56 ± 0.000	8.37E6	1.84E-7	1.24E-2	-8.67
2112-11-24.244	92779.244	4.407	2.21 ± 0.000	1.20E5	6.27E-10	1.24E-2	-11.14
2113-11-24.440	93144.440	0.874	0.36 ± 0.000	1.02E7	1.43E-7	1.24E-2	-8.79
2114-11-24.665	93509.665	0.908	0.37 ± 0.000	5.12E6	2.75E-7	1.24E-2	-8.51
2116-11-24.108	94240.108	1.260	0.75 ± 0.002	2.86E5	3.27E-6	1.24E-2	-7.44
2116-11-24.157	94240.157	0.955	2.53 ± 0.001	3.98E5	1.74E-6	1.25E-2	-7.72
2117-11-24.228	94605.228	-0.605	1.82 ± 0.506	8.49E7	1.45E-8	1.24E-2	-9.80
2117-11-24.478	94605.478	0.972	2.56 ± 0.000	7.33E5	8.01E-7	1.24E-2	-8.06
2118-11-24.731	94970.731	-2.107	0.86 ± 0.011	1.57E6	1.41E-7	1.24E-2	-8.82
2118-11-24.763	94970.763	-0.695	0.21 ± 0.000	4.57E7	3.68E-8	1.24E-2	-9.40
2119-11-24.883	95335.883	1.307	2.12 ± 0.000	2.08E6	2.80E-7	1.24E-2	-8.53
2119-11-24.909	95335.909	-0.974	1.29 ± 0.000	1.63E7	7.28E-8	1.24E-2	-9.11
2119-11-24.994	95335.994	4.487	2.51 ± 0.000	8.75E4	3.92E-10	1.24E-2	-11.38
2119-11-24.996	95335.996	0.759	2.39 ± 0.007	8.34E5	1.16E-6	1.25E-2	-7.91
2121-11-24.559	96066.559	-0.543	1.35 ± 0.000	5.01E6	3.23E-7	1.24E-2	-8.47


Based on 28 optical observations (of which 0 are rejected as outliers) from 2017/11/27.262 to 2017/12/16.266.
Coordinates are given on the Target Plane.
Unit is one Earth radius, but impact cross section has radius between 2.69 and 2.70 Earth radii.
Coordinates for LOV = EQU scaled= 1 second= F.
AstOD software version= 4.0, Date of computation=20250805 130500.123 UTC.

Download this part as:

Download Impactor Table as: