Asteroids

2018BY6 help

Last update: 2026-02-10 13:02 UTC

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.871

Aphelion (Q)

1.549

Eccentricity (e)

0.280

Inclination (i)

6.6

deg

Orbit period (P)

486.3

Earth MOID

0.01082

U parameter

0.2

Next Earth close approach

Date

2029-07-15

Nominal distance (from Earth center)

0.0129

1929326

Maximum Brightness

15.8

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

23.4

mag

Diameter

50 - 120*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2018-01-16

Observatory

Pan-STARRS 1, Haleakala

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

1.210163

1-sigma variation

7.346E-9

Unit

Eccentricity (e)

Value

0.280186

1-sigma variation

3.696E-8

Unit

Inclination (i)

Value

6.5563

1-sigma variation

1.535E-5

Unit

Long. of Ascending Node (Ω)

Value

288.1898

1-sigma variation

2.202E-5

Unit

Arg. of Perihelion (ω)

Value

75.9548

1-sigma variation

3.084E-5

Unit

Mean Anomaly (M)

Value

50.56579

1-sigma variation

0.00002

Unit

Perihelion distance

Value

0.871093

1-sigma variation

Unit

Aphelion distance

Value

1.549233

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.026013

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.213007

1-sigma variation

Unit

MOID

Value

0.010825

1-sigma variation

Unit

Orbit Period

Value

486.2552

1-sigma variation

Unit

U parameter

Value

0.2

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	5.39571E-17	-6.19914E-17	6.84650E-15	7.10452E-14	-1.68408E-13	1.11414E-13
e	-6.19914E-17	1.36593E-15	-7.84710E-15	-1.04775E-15	-6.77030E-14	1.83936E-13
i	6.84650E-15	-7.84710E-15	2.35758E-10	1.91848E-10	-2.15267E-10	2.85944E-11
Ω	7.10452E-14	-1.04775E-15	1.91848E-10	4.84923E-10	-5.91221E-10	1.29462E-10
ω	-1.68408E-13	-6.77030E-14	-2.15267E-10	-5.91221E-10	9.51200E-10	-4.08871E-10
M	1.11414E-13	1.83936E-13	2.85944E-11	1.29462E-10	-4.08871E-10	3.32128E-10

Date of computation: 2026-02-10 13:02 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

23.422

Unit

mag

Source

[1]

Slope Parameter (G)

Value

0.15**

Unit

Source

[1]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.05 - 0.25

Unit

Source

[2]

Diameter

Value

50 - 120*

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

5879

Unit

Source

[1]

Unobserved

Value

Unit

Source

[1]

Normalized RMS of residuals

Value

0.637032

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2010-01-06.367211

Unit

Source

[2]

Last Observation

Value

2026-02-10.36431

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

36 (3)

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

Note: Ephemerides requests are limited to a maximum of 100 points and a final date not exceeding 2080/07/22 14:12.

Close Approaches for 2018BY6 from 1950 to 2126

Body	Date in UTC	Time uncert. in min	Nominal distance in au	Min. possible distance in au	Distance uncert. in au
EARTH	1952-07-11 04:16	< 1 min	0.0529998	0.0529977	0.0000007
EARTH	1956-07-04 21:03	< 1 min	0.1551537	0.1551514	0.0000008
EARTH	1997-12-13 22:17	< 1 min	0.1930734	0.1930724	0.0000003
EARTH	2001-12-08 17:10	< 1 min	0.0990065	0.0990058	0.0000002
EARTH	2005-12-03 13:27	< 1 min	0.0743698	0.0743692	0.0000002
EARTH	2009-11-18 03:06	< 1 min	0.1311465	0.1311458	0.0000002
EARTH	2013-10-06 08:19	< 1 min	0.1665281	0.1665276	0.0000002
EARTH	2017-09-06 10:00	< 1 min	0.1576712	0.1576708	0.0000001
EARTH	2021-08-04 20:11	< 1 min	0.1084338	0.1084333	0.0000002
EARTH	2025-07-19 07:19	< 1 min	0.0351576	0.0351571	0.0000002
EARTH	2029-07-15 07:57	< 1 min	0.0128967	0.0128965	0.0000001
EARTH	2033-07-06 17:47	< 1 min	0.1341090	0.1341072	0.0000006
EARTH	2070-12-10 02:01	< 1 min	0.1029114	0.1029012	0.0000034
EARTH	2074-12-02 11:14	< 1 min	0.0834896	0.0834824	0.0000024
EARTH	2078-10-18 13:18	3.3	0.1604425	0.1604387	0.0000013
EARTH	2082-09-06 13:31	3.1	0.1576606	0.1576566	0.0000013
EARTH	2086-07-26 12:29	1.1	0.0771604	0.0771487	0.0000039
EARTH	2090-07-14 00:37	< 1 min	0.0319610	0.0319526	0.0000028
EARTH	2094-07-03 20:43	< 1 min	0.1981411	0.1981328	0.0000028
EARTH	2123-12-10 20:21	2.8	0.0870132	0.0869340	0.0000264

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
303.62665957	191.90481792	0.01082472	MINIMUM
53.57558545	331.39071460	0.07112513	MINIMUM
0.41287383	264.44544275	0.16757489	SADDLE
179.02523847	81.37840537	0.56787650	SADDLE
356.57499838	79.27784187	1.86629026	SADDLE
177.55358941	260.26679802	2.54877932	MAXIMUM

Download:

MOID Plots

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