Asteroids

2018VP1 help

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

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.877

Aphelion (Q)

1.955

Eccentricity (e)

0.381

Inclination (i)

3.3

deg

Orbit period (P)

615.2

Earth MOID

0.00009

U parameter

9.0

Next Earth close approach

Date

2042-06-25

Nominal distance (from Earth center)

0.15247

22808833

Maximum Brightness

29.4

mag

Risk

Object is in risk list

Physical Properties

Absolute Magnitude (H)

30.7

mag

Diameter

2.0 - 4*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2018-11-03

Observatory

Palomar Mountain--ZTF

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

1.415687

1-sigma variation

1.866520

Unit

Eccentricity (e)

Value

0.380617

1-sigma variation

0.539300

Unit

Inclination (i)

Value

3.2738

1-sigma variation

2.8220

Unit

Long. of Ascending Node (Ω)

Value

39.7299

1-sigma variation

0.4106

Unit

Arg. of Perihelion (ω)

Value

305.3457

1-sigma variation

134.2380

Unit

Mean Anomaly (M)

Value

24.31118

1-sigma variation

2286.49000

Unit

Perihelion distance

Value

0.876852

1-sigma variation

Unit

Aphelion distance

Value

1.954523

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.000440

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.544025

1-sigma variation

Unit

MOID

Value

0.000091

1-sigma variation

Unit

Orbit Period

Value

615.2469

1-sigma variation

Unit

U parameter

Value

9.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	3.48390E0	1.00662E0	5.26734E0	7.66403E-1	2.50558E2	-4.26779E3
e	1.00662E0	2.90845E-1	1.52191E0	2.21439E-1	7.23945E1	-1.23311E3
i	5.26734E0	1.52191E0	7.96372E0	1.15873E0	3.78820E2	-6.45250E3
Ω	7.66403E-1	2.21439E-1	1.15873E0	1.68596E-1	5.51187E1	-9.38846E2
ω	2.50558E2	7.23945E1	3.78820E2	5.51187E1	1.80198E4	-3.06934E5
M	-4.26779E3	-1.23311E3	-6.45250E3	-9.38846E2	-3.06934E5	5.22806E6

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

30.669

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

2.0 - 4*

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

2549

Unit

Source

[1]

Normalized RMS of residuals

Value

0.699656

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2018-11-03.272495

Unit

Source

[2]

Last Observation

Value

2018-11-16.240265

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

21 (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 2018VP1 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	1955-08-14 08:08	> 1 mo	0.1052548	0.0675190	1.2698062
EARTH	1968-09-26 22:37	> 1 mo	0.1101370	0.0392095	0.6286576
EARTH	1981-10-31 01:17	> 1 w	0.0147193	0.0003014	0.0682503
EARTH	1994-08-24 10:51	> 1 w	0.1164606	0.0863596	0.0148134
MARS	2004-05-05 18:57	> 1 d	0.0466156	0.0458417	0.0062102
EARTH	2007-07-07 09:47	> 1 d	0.1382052	0.0607265	0.0332296
EARTH	2018-11-02 18:19	< 1 min	0.0010096	0.0010082	0.0000005
EARTH	2020-11-01 23:52	1116.6	0.0004280	0.0000453	0.0056480
EARTH	2042-06-25 07:40	> 1 mo	0.1524676	0.0525179	231.4185821
EARTH	2047-08-16 16:46	> 1 mo	0.1313578	0.0790430	68.6330119
EARTH	2052-11-03 14:11	> 1 mo	0.0113034	0.0004981	257.6415395
EARTH	2069-09-21 14:15	> 1 mo	0.1282227	0.0514239	4742.7672217
MARS	2072-09-08 10:27	> 1 mo	0.0288030	0.0081556	13310.5941385
EARTH	2086-07-20 03:43	> 1 mo	0.0839900	0.0537495	8002.8610526
EARTH	2091-11-15 03:47	> 1 mo	0.1476248	0.0035192	9752.6729919
EARTH	2103-06-30 12:06	> 1 mo	0.1162882	0.0582120	694.2701491
EARTH	2108-10-29 05:24	> 1 mo	0.0382069	0.0016576	5265.4326220
EARTH	2125-07-20 19:56	> 1 mo	0.0828948	0.0540711	3958.0095932

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
38.20173775	298.34898920	0.00006478	MINIMUM
317.31941126	182.33404040	0.05281291	MINIMUM
356.20696006	238.13334990	0.13873053	SADDLE
178.76763931	61.63919589	0.96437433	SADDLE
357.65564226	60.30216216	1.86838685	SADDLE
179.03895895	241.81383976	2.96115407	MAXIMUM

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MOID Plots

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

Level lines of the squared distance function

2018VP1

Date in UTC	MJD	σ	Distance ± Width in RE	Stretching in RE	IP	Impact energy	PS
2026-11-02.578	61346.578	0.056	1.22 ± 0.000	1.26E7	6.21E-8	4.11E-4	-8.52
2027-04-27.460	61522.460	0.059	0.88 ± 0.013	1.52E7	8.00E-8	4.11E-4	-8.51
2027-11-02.815	61711.815	0.100	1.53 ± 0.000	1.13E7	2.30E-8	4.11E-4	-9.21
2027-11-02.877	61711.877	0.058	0.95 ± 0.001	1.41E7	7.83E-8	4.13E-4	-8.68
2028-11-01.875	62076.875	0.059	1.15 ± 0.000	1.74E7	4.72E-8	4.11E-4	-9.06
2030-11-02.472	62807.472	0.061	0.86 ± 0.000	2.30E7	4.43E-8	4.13E-4	-9.29
2033-11-02.447	63903.447	0.057	0.33 ± 0.000	3.33E7	3.60E-8	4.11E-4	-9.58
2036-11-02.100	64999.100	0.064	1.13 ± 0.000	3.04E7	2.80E-8	4.11E-4	-9.80
2047-11-02.729	69016.729	0.058	0.79 ± 0.000	2.38E7	4.44E-8	4.10E-4	-9.90
2055-11-03.372	71939.372	0.060	0.12 ± 0.000	1.49E8	8.23E-9	4.11E-4	-10.76
2057-11-02.138	72669.138	0.061	0.19 ± 0.003	5.38E7	2.26E-8	4.12E-4	-10.35
2065-11-02.679	75591.679	0.057	0.65 ± 0.010	4.87E7	2.46E-8	4.11E-4	-10.41
2067-11-03.164	76322.164	0.056	1.14 ± 0.002	8.54E7	9.76E-9	4.11E-4	-10.84
2076-05-01.334	79424.334	0.058	0.97 ± 0.006	1.98E7	4.85E-8	4.12E-4	-10.21


Based on 21 optical observations (of which 0 are rejected as outliers) from 2018/11/03.272 to 2018/11/16.240.
Coordinates are given on the Target Plane.
Unit is one Earth radius, but impact cross section has radius between 1.54 and 1.54 Earth radii.
Coordinates for LOV = EQU scaled= 1 second= F.
AstOD software version= 4.0, Date of computation=20251103 080436.161 UTC.

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