Asteroids

2017SH33 help

Last update: 2025-03-29 00:36 UTC

Orbital Properties

Epoch

60800.0

MJD

Orbit type

Amor

Perihelion (q)

1.235

Aphelion (Q)

2.064

Eccentricity (e)

0.251

Inclination (i)

61.6

deg

Orbit period (P)

773.7

Earth MOID

0.24485

U parameter

9.0

Next Earth close approach

Date

Nominal distance (from Earth center)

Maximum Brightness

mag

Risk

Object is in risk list

Object is not in priority list

Physical Properties

Absolute Magnitude (H)

17.9

mag

Diameter

700 - 1600*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2017-09-25

Observatory

WISE

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

1.649351

1-sigma variation

3.056270

Unit

Eccentricity (e)

Value

0.251106

1-sigma variation

1.238620

Unit

Inclination (i)

Value

61.6279

1-sigma variation

31.7162

Unit

Long. of Ascending Node (Ω)

Value

224.0464

1-sigma variation

12.6573

Unit

Arg. of Perihelion (ω)

Value

174.9764

1-sigma variation

51.1464

Unit

Mean Anomaly (M)

Value

206.20341

1-sigma variation

3610.59000

Unit

Perihelion distance

Value

1.235189

1-sigma variation

Unit

Aphelion distance

Value

2.063512

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

1.052464

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.244975

1-sigma variation

Unit

MOID

Value

0.244853

1-sigma variation

Unit

Orbit Period

Value

773.6918

1-sigma variation

Unit

U parameter

Value

9.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	9.34076E0	3.78553E0	9.68062E1	3.86653E1	1.55135E2	-1.10349E4
e	3.78553E0	1.53417E0	3.92360E1	1.56691E1	6.28842E1	-4.47213E3
i	9.68062E1	3.92360E1	1.00592E3	4.00085E2	1.61798E3	-1.14370E5
Ω	3.86653E1	1.56691E1	4.00085E2	1.60206E2	6.39703E2	-4.56767E4
ω	1.55135E2	6.28842E1	1.61798E3	6.39703E2	2.61596E3	-1.83294E5
M	-1.10349E4	-4.47213E3	-1.14370E5	-4.56767E4	-1.83294E5	1.30363E7

Date of computation: 2025-03-29 00:36 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

17.874

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

700 - 1600*

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

Unit

Source

[1]

Unobserved

Value

2786

Unit

Source

[1]

Normalized RMS of residuals

Value

0.610724

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2017-09-25.49326

Unit

Source

[2]

Last Observation

Value

2017-09-26.73723

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

11 (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

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
3.58577688	302.26430979	0.24485322	MINIMUM
192.28373420	123.57058262	1.04977429	MINIMUM
279.41616782	191.19058886	1.38758517	SADDLE
92.44715985	54.77876236	1.44244387	SADDLE
304.33223481	64.60415769	2.12045915	SADDLE
60.53731700	173.07031807	2.19031894	SADDLE
10.78973408	126.68453999	2.24690531	MAXIMUM
182.37341582	299.90837921	3.05403820	MAXIMUM

Download:

MOID Plots

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

Level lines of the squared distance function

2017SH33

Date in UTC	MJD	σ	σ_imp	Distance ± Width in RE	Stretching in RE/σ	IP	Exp. energy	PS
2026-04-30.358	61160.358	-0.675	0.031	1.09 ± 141.116	4.98E5	6.55E-9	8.21E-7	-5.06
2051-04-30.717	70291.717	-0.675	0.074	0.41 ± 151.652	7.98E6	2.10E-11	2.63E-9	-8.90
2069-04-30.288	76866.288	-0.676	0.007	1.10 ± 149.849	1.45E7	2.11E-10	2.64E-8	-8.13
2086-04-30.617	83075.617	-0.676	0.022	0.32 ± 188.109	8.25E6	4.44E-10	5.54E-8	-7.94


Based on 11 optical observations (of which 0 are rejected as outliers) from 2017/09/25.493 to 2017/09/26.737.
Coordinates are given on the Target Plane.
Unit is one Earth radius, but impact cross section has radius between 1.09 and 1.09 Earth radii.
Coordinates for LOV = EQU scaled= 1 second= F.
AstOD software version= 4.0, Date of computation=20250305 091456.965 UTC.

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Download Impactor Table as: