Asteroids

2018VS6 help

Last update: 2025-06-12 11:40 UTC

Orbital Properties

Epoch

60800.0

MJD

Orbit type

Apollo

Perihelion (q)

0.718

Aphelion (Q)

1.550

Eccentricity (e)

0.367

Inclination (i)

5.5

deg

Orbit period (P)

440.9

Earth MOID

0.00195

U parameter

7.6

Next Earth close approach

Date

2047-10-16

Nominal distance (from Earth center)

0.18902

28277370

Maximum Brightness

27.3

mag

Risk

Object is in risk list

Object is not in priority list

Physical Properties

Absolute Magnitude (H)

26.9

mag

Diameter

11 - 24*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2018-11-10

Observatory

Mt. Lemmon 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

60800.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.133767

1-sigma variation

0.000372

Unit

Eccentricity (e)

Value

0.366861

1-sigma variation

0.000179

Unit

Inclination (i)

Value

5.5482

1-sigma variation

0.0143

Unit

Long. of Ascending Node (Ω)

Value

226.5489

1-sigma variation

0.0185

Unit

Arg. of Perihelion (ω)

Value

87.3003

1-sigma variation

0.0489

Unit

Mean Anomaly (M)

Value

187.72633

1-sigma variation

0.42342

Unit

Perihelion distance

Value

0.717832

1-sigma variation

Unit

Aphelion distance

Value

1.549701

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.044662

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.008032

1-sigma variation

Unit

MOID

Value

0.001946

1-sigma variation

Unit

Orbit Period

Value

440.9445

1-sigma variation

Unit

U parameter

Value

7.6

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.38074E-7	6.64698E-8	-5.32351E-6	6.86091E-6	-1.81543E-5	-1.57338E-4
e	6.64698E-8	3.19991E-8	-2.56277E-6	3.30288E-6	-8.73959E-6	-7.57433E-5
i	-5.32351E-6	-2.56277E-6	2.05250E-4	-2.64525E-4	6.99944E-4	6.06623E-3
Ω	6.86091E-6	3.30288E-6	-2.64525E-4	3.40919E-4	-9.02085E-4	-7.81812E-3
ω	-1.81543E-5	-8.73959E-6	6.99944E-4	-9.02085E-4	2.38696E-3	2.06871E-2
M	-1.57338E-4	-7.57433E-5	6.06623E-3	-7.81812E-3	2.06871E-2	1.79289E-1

Date of computation: 2025-06-12 11:40 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

26.942

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

11 - 24*

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

2416

Unit

Source

[1]

Normalized RMS of residuals

Value

0.657653

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2018-11-09.544497

Unit

Source

[2]

Last Observation

Value

2018-11-19.41595

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

101 (1)

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 2018VS6 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	1956-05-02 16:05	557.7	0.0158291	0.0087517	0.0059317
EARTH	1967-04-24 14:07	212.8	0.1655222	0.1546872	0.0036122
EARTH	1968-11-11 21:06	206.5	0.0837552	0.0755421	0.0027378
EARTH	1979-11-04 19:40	260.6	0.0679770	0.0579453	0.0033442
EARTH	1995-05-08 06:43	784.7	0.0871717	0.0645142	0.0075699
EARTH	2006-04-28 15:30	492.9	0.0802155	0.0589278	0.0071112
EARTH	2007-11-16 17:45	405.5	0.1685321	0.1478996	0.0068775
EARTH	2018-11-08 08:14	< 1 s	0.0037259	0.0037232	0.0000009
EARTH	2023-05-01 13:54	272.7	0.0134721	0.0111311	0.0019647
EARTH	2024-11-15 16:01	381.2	0.1702117	0.1474450	0.0075889
EARTH	2047-10-16 21:22	> 1 w	0.1890225	0.0219109	0.0636955
EARTH	2052-04-24 20:22	> 1 d	0.1166460	0.0114850	0.0837615
EARTH	2053-11-10 07:35	> 1 d	0.0435235	0.0011626	0.0886361
EARTH	2058-05-10 06:31	> 1 d	0.1270450	0.0615706	0.0218679
EARTH	2076-10-18 16:04	> 1 mo	0.1827804	0.0190690	0.2280232
EARTH	2081-04-26 12:03	> 1 w	0.0936388	0.0104753	0.2986067
EARTH	2082-11-12 05:59	> 1 w	0.0748414	0.0007268	0.3039080
EARTH	2087-05-21 06:19	> 1 mo	0.1780350	0.0273642	0.2008543
EARTH	2105-11-02 19:52	> 1 d	0.1110415	0.0008019	0.0734669
EARTH	2110-05-01 14:20	> 1 w	0.0219942	0.0093970	0.1248167
EARTH	2111-11-16 15:28	> 1 d	0.1313861	0.0026070	0.0675870
EARTH	2116-05-16 14:32	> 1 w	0.1622242	0.0196181	0.1640794

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
69.97177509	303.99619702	0.00194601	MINIMUM
288.07690038	117.15193582	0.01115149	MINIMUM
358.64423936	210.26625354	0.30735932	SADDLE
179.36804859	30.85901612	0.57623621	SADDLE
358.43408845	29.93089529	1.70180101	SADDLE
179.17282107	210.71809379	2.56075626	MAXIMUM

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MOID Plots

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

Level lines of the squared distance function

2018VS6

Date in UTC	MJD	σ	Distance ± Width in RE	Stretching in RE/σ	IP	Exp. energy	PS
2083-11-09.324	82172.324	-2.943	1.11 ± 0.000	9.23E3	1.37E-6	1.50E-7	-6.88
2083-11-09.342	82172.342	-3.348	0.73 ± 0.001	1.09E3	3.16E-6	3.46E-7	-6.52
2088-11-08.473	83998.473	-2.458	1.26 ± 0.001	6.71E5	3.24E-8	3.54E-9	-8.54
2090-11-09.040	84729.040	-3.386	1.33 ± 0.000	7.87E5	1.22E-9	1.34E-10	-9.98
2100-11-09.593	88381.593	-2.791	0.89 ± 0.000	4.89E5	3.50E-8	3.84E-9	-8.58
2101-11-09.685	88746.685	0.634	1.09 ± 0.000	7.04E6	8.08E-8	8.85E-9	-8.22
2106-11-10.062	90573.062	-2.772	0.69 ± 0.000	2.33E5	8.79E-8	9.63E-9	-8.21
2107-11-10.257	90938.257	0.678	1.32 ± 0.001	5.38E5	1.17E-6	1.28E-7	-7.09
2108-11-09.602	91303.602	0.607	1.24 ± 0.000	4.13E6	9.64E-8	1.06E-8	-8.18
2108-11-09.626	91303.626	0.616	0.81 ± 0.000	8.41E6	8.72E-8	9.58E-9	-8.22
2111-11-10.212	92399.212	-0.170	1.30 ± 0.000	1.30E6	7.53E-7	8.26E-8	-7.30
2112-11-09.443	92764.443	-2.157	1.32 ± 0.001	1.02E4	3.15E-6	3.44E-7	-6.69
2117-11-09.671	94590.671	-1.120	0.29 ± 0.001	4.06E5	1.43E-6	1.57E-7	-7.05
2118-11-09.859	94955.859	-0.510	1.37 ± 0.001	3.62E6	1.99E-8	2.18E-9	-8.91
2118-11-09.888	94955.888	-2.609	0.64 ± 0.001	4.02E5	8.05E-8	8.81E-9	-8.31
2120-11-09.372	95686.372	-0.248	1.35 ± 0.000	3.93E7	5.61E-9	6.15E-10	-9.47
2120-11-09.397	95686.397	-1.467	0.85 ± 0.000	3.53E7	8.39E-9	9.19E-10	-9.30
2121-11-09.707	96051.707	-0.455	1.07 ± 0.000	5.21E6	1.50E-7	1.65E-8	-8.05


Based on 101 optical observations (of which 1 are rejected as outliers) from 2018/11/09.544 to 2018/11/19.416.
Coordinates are given on the Target Plane.
Unit is one Earth radius, but impact cross section has radius between 1.38 and 1.38 Earth radii.
Coordinates for LOV = EQU scaled= 1 second= F.
AstOD software version= 4.0, Date of computation=20250305 084854.706 UTC.

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