Asteroids

2018QE help

Last update: 2024-04-25 01:36 UTC

Orbital Properties

Epoch

60400.0

MJD

Orbit type

Apollo

Perihelion (q)

0.990

Aphelion (Q)

1.633

Eccentricity (e)

0.245

Inclination (i)

0.2

deg

Orbit period (P)

548.6

Earth MOID

0.00255

U parameter

7.7

Next Earth close approach

Date

2024-10-05

Nominal distance (from Earth center)

0.00366

547428

Maximum Brightness

19.2

mag

Risk

Object is in risk list

Object is not in priority list

Physical Properties

Absolute Magnitude (H)

27.7

mag

Diameter

8 - 17*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2018-08-17

Observatory

ATLAS-MLO, Mauna Loa

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

1.311514

1-sigma variation

0.000676

Unit

Eccentricity (e)

Value

0.245465

1-sigma variation

0.000290

Unit

Inclination (i)

Value

0.1766

1-sigma variation

0.0015

Unit

Long. of Ascending Node (Ω)

Value

95.3319

1-sigma variation

2.6971

Unit

Arg. of Perihelion (ω)

Value

260.7822

1-sigma variation

2.6101

Unit

Mean Anomaly (M)

Value

245.93111

1-sigma variation

0.31892

Unit

Perihelion distance

Value

0.989583

1-sigma variation

Unit

Aphelion distance

Value

1.633444

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.292491

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.175955

1-sigma variation

Unit

MOID

Value

0.002552

1-sigma variation

Unit

Orbit Period

Value

548.6023

1-sigma variation

Unit

U parameter

Value

7.7

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	4.57091E-7	1.95909E-7	-1.01995E-6	1.82348E-3	-1.76465E-3	-2.15618E-4
e	1.95909E-7	8.39665E-8	-4.37150E-7	7.81543E-4	-7.56330E-4	-9.24138E-5
i	-1.01995E-6	-4.37150E-7	2.27592E-6	-4.06890E-3	3.93763E-3	4.81128E-4
Ω	1.82348E-3	7.81543E-4	-4.06890E-3	7.27445E0	-7.03977E0	-8.60169E-1
ω	-1.76465E-3	-7.56330E-4	3.93763E-3	-7.03977E0	6.81266E0	8.32419E-1
M	-2.15618E-4	-9.24138E-5	4.81128E-4	-8.60169E-1	8.32419E-1	1.01711E-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

27.737

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

8 - 17*

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

2076

Unit

Source

[1]

Normalized RMS of residuals

Value

0.728441

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2018-08-05.317385

Unit

Source

[2]

Last Observation

Value

2018-08-19.6055

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

30 (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 2018QE 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	1951-08-18 20:38	> 1 mo	0.0029408	0.0008054	0.8064120
EARTH	1954-10-17 01:52	> 1 mo	0.0359970	0.0041921	1.1386073
EARTH	1992-08-06 11:42	> 1 mo	0.0428563	0.0001562	0.3060644
EARTH	1995-10-10 08:21	> 1 w	0.0104795	0.0040653	0.0250225
EARTH	2018-08-20 03:17	< 1 min	0.0071911	0.0071804	0.0000036
EARTH	2021-09-24 21:17	> 1 d	0.0133419	0.0094077	0.0013305
EARTH	2024-10-05 17:58	> 1 d	0.0036593	0.0028586	0.0033853
EARTH	2027-07-25 09:59	> 1 w	0.1386741	0.0226813	0.1381245
EARTH	2058-10-14 18:32	> 1 mo	0.0168583	0.0025522	0.9818864
EARTH	2061-08-28 19:49	> 1 mo	0.0127869	0.0087716	2.0735198
EARTH	2064-08-10 16:08	> 1 mo	0.0237038	0.0086014	2.9533959
EARTH	2067-07-23 12:49	> 1 mo	0.1752633	0.0129797	10.5282105
EARTH	2110-11-05 06:25	> 1 mo	0.1923960	0.0011249	171.7725785
EARTH	2113-10-19 09:38	> 1 mo	0.0309452	0.0005709	140.6214390
EARTH	2116-09-22 12:01	> 1 mo	0.0151232	0.0015269	68.4147360
EARTH	2119-08-08 08:06	> 1 mo	0.0405229	0.0087897	110.6172647

Download as:

2018QE

Date in UTC	MJD	σ	σ_imp	Distance ± Width in RE	Stretching in RE/σ	IP	Exp. energy	PS
2036-09-30.850	64966.850	3.055	0.000	1.18 ± 0.007	3.75E4	5.47E-7	1.03E-8	-7.25
2046-10-11.200	68629.200	3.467	0.000	2.04 ± 0.005	7.40E4	7.18E-8	1.36E-9	-8.37
2052-08-22.776	70771.776	1.374	0.000	0.60 ± 0.033	1.21E6	7.11E-7	1.34E-8	-7.48
2068-10-11.071	76665.071	1.319	0.000	2.34 ± 0.001	5.58E4	1.38E-5	2.60E-7	-6.38
2071-08-23.862	77711.862	1.390	0.000	1.07 ± 0.017	1.41E6	5.69E-7	1.07E-8	-7.79
2079-09-04.905	80645.905	1.326	0.000	2.23 ± 0.000	2.32E7	2.54E-8	4.80E-10	-9.20
2083-09-30.482	82132.482	1.689	0.000	1.52 ± 0.000	1.18E6	4.03E-7	7.58E-9	-8.03
2083-10-01.179	82133.179	1.709	0.000	1.76 ± 0.000	1.56E6	2.72E-7	5.11E-9	-8.21
2083-10-10.791	82142.791	0.415	0.000	2.04 ± 0.007	6.48E5	2.59E-6	4.87E-8	-7.23
2094-10-11.039	86161.039	1.320	0.000	1.00 ± 0.008	3.65E7	2.46E-8	4.64E-10	-9.32
2095-10-09.950	86524.950	-0.272	0.000	2.36 ± 0.004	8.83E5	1.60E-6	3.00E-8	-7.51
2098-10-08.371	87619.371	-0.119	0.000	0.50 ± 0.253	5.85E7	3.80E-8	7.15E-10	-9.15
2098-10-08.495	87619.495	-0.188	0.000	1.16 ± 0.013	3.22E6	6.52E-7	1.23E-8	-7.92
2103-10-08.470	89444.470	0.024	0.000	1.74 ± 0.253	6.48E7	3.04E-8	5.71E-10	-9.28
2107-10-05.878	90902.878	2.152	0.000	0.40 ± 0.000	6.40E7	3.48E-9	6.56E-11	-10.24
2107-10-09.282	90906.282	-0.181	0.000	2.52 ± 0.016	1.09E7	1.09E-7	2.05E-9	-8.75
2114-10-10.796	93464.796	0.607	1.757	2.90 ± 0.016	3.32E7	1.36E-10	2.55E-12	-11.68
2117-10-04.837	94554.837	0.868	0.000	1.47 ± 0.002	2.80E6	4.84E-7	9.10E-9	-8.14
2120-10-04.104	95650.104	0.868	0.000	2.73 ± 0.008	1.42E7	3.68E-8	6.91E-10	-9.28


Based on 30 optical observations (of which 0 are rejected as outliers) from 2018/08/05.317 to 2018/08/19.605.
Coordinates are given on the Target Plane.
Unit is one Earth radius, but impact cross section has radius between 2.85 and 2.86 Earth radii.
Coordinates for LOV = EQU scaled= 1 second= F.
AstOD software version= 4.0, Date of computation=20240110 090430.568 UTC.

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