Asteroids

2018BH3 help

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

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Aten

Perihelion (q)

0.573

Aphelion (Q)

1.160

Eccentricity (e)

0.338

Inclination (i)

2.0

deg

Orbit period (P)

294.6

Earth MOID

0.00053

U parameter

3.5

Next Earth close approach

Date

2027-04-23

Nominal distance (from Earth center)

0.14994

22431136

Maximum Brightness

24.8

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

25.4

mag

Diameter

22 - 50*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2018-01-20

Observatory

Catalina Sky 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

61000.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

0.866556

1-sigma variation

3.662E-7

Unit

Eccentricity (e)

Value

0.338439

1-sigma variation

3.842E-7

Unit

Inclination (i)

Value

1.9919

1-sigma variation

1.208E-5

Unit

Long. of Ascending Node (Ω)

Value

298.8604

1-sigma variation

2.815E-5

Unit

Arg. of Perihelion (ω)

Value

50.3020

1-sigma variation

0.0001

Unit

Mean Anomaly (M)

Value

354.15649

1-sigma variation

0.00273

Unit

Perihelion distance

Value

0.573280

1-sigma variation

Unit

Aphelion distance

Value

1.159832

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.386580

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.005000

1-sigma variation

Unit

MOID

Value

0.000533

1-sigma variation

Unit

Orbit Period

Value

294.6412

1-sigma variation

Unit

U parameter

Value

3.5

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.34117E-13	-1.17793E-13	5.46811E-14	7.53099E-12	2.19128E-11	-9.98696E-10
e	-1.17793E-13	1.47624E-13	4.26044E-14	-6.83740E-12	-1.83359E-11	8.70315E-10
i	5.46811E-14	4.26044E-14	1.45959E-10	2.08884E-10	-1.96171E-10	-4.26624E-10
Ω	7.53099E-12	-6.83740E-12	2.08884E-10	7.92687E-10	8.58310E-10	-5.60570E-8
ω	2.19128E-11	-1.83359E-11	-1.96171E-10	8.58310E-10	3.96757E-9	-1.63304E-7
M	-9.98696E-10	8.70315E-10	-4.26624E-10	-5.60570E-8	-1.63304E-7	7.43778E-6

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

25.427

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

22 - 50*

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

[-]

Download this part as:

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

2781

Unit

Source

[1]

Normalized RMS of residuals

Value

0.556564

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2018-01-20.41456

Unit

Source

[2]

Last Observation

Value

2018-02-04.17043

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

99 (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

2018-01-26

Unit

Source

[3]

Last Observation

Value

2018-01-26

Unit

Source

[3]

Delay (Discarded)

Value

0 (0)

Unit

Source

[-]

Doppler (Discarded)

Value

1 (0)

Unit

Source

[1]

Total Radar Observations (Discarded)

Value

1 (0)

Unit

Source

[1]

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
[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 2018BH3 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	1953-02-11 03:01	> 1 w	0.1406886	0.0461439	0.0319082
EARTH	1958-04-29 05:50	28.5	0.0386783	0.0344031	0.0196628
EARTH	1962-01-29 00:53	> 1 w	0.0952316	0.0025751	0.0319273
EARTH	1967-04-28 19:31	1417.7	0.0414198	0.0343415	0.0157699
EARTH	1971-01-23 02:39	> 1 d	0.0534567	0.0007060	0.0265795
EARTH	1976-04-24 17:00	> 1 d	0.0764876	0.0484131	0.0101771
EARTH	1980-01-20 22:19	3.5	0.0030391	0.0026806	0.0001195
VENUS	1980-09-29 10:33	10.3	0.0490727	0.0486500	0.0001411
EARTH	1989-04-25 18:28	< 1 min	0.0523964	0.0521483	0.0000829
EARTH	1993-04-01 06:54	27.5	0.1451291	0.1450496	0.0000265
EARTH	1997-02-17 05:27	5.8	0.1506990	0.1506795	0.0000065
EARTH	2001-01-19 23:09	< 1 min	0.0294012	0.0292761	0.0000417
VENUS	2009-01-13 01:24	3.2	0.0355988	0.0355206	0.0000261
EARTH	2010-04-23 04:34	4.1	0.0678326	0.0677645	0.0000227
VENUS	2013-09-10 14:20	3.3	0.0419737	0.0418917	0.0000273
EARTH	2014-03-05 11:45	9.1	0.1703841	0.1703787	0.0000018
EARTH	2018-01-20 10:10	< 1 s	0.0106320	0.0106319	0.0000000
EARTH	2022-01-23 05:35	< 1 min	0.1768550	0.1767918	0.0000211
EARTH	2027-04-23 13:51	1.6	0.1499429	0.1498355	0.0000358
EARTH	2031-04-23 00:54	4.1	0.0638270	0.0637463	0.0000269
VENUS	2034-11-17 15:42	3.1	0.0307306	0.0306555	0.0000251
EARTH	2035-03-15 22:39	13.8	0.1687288	0.1687188	0.0000033
EARTH	2039-01-31 00:48	9.3	0.1033633	0.1032916	0.0000239
VENUS	2039-07-13 17:09	5.4	0.0460435	0.0459253	0.0000394
EARTH	2043-01-21 17:58	1.0	0.1288272	0.1287772	0.0000167
EARTH	2048-04-23 13:16	< 1 min	0.1339902	0.1339579	0.0000108
EARTH	2052-04-14 05:32	8.7	0.1094309	0.1093700	0.0000203
EARTH	2056-02-27 00:06	18.6	0.1657583	0.1657370	0.0000071
EARTH	2060-01-20 15:08	2.2	0.0108975	0.0107492	0.0000494
EARTH	2064-01-22 10:30	16.0	0.1455208	0.1443531	0.0003892
EARTH	2073-04-24 09:33	29.6	0.0756607	0.0727093	0.0009892
EARTH	2077-04-20 14:31	155.1	0.0733452	0.0709871	0.0007897
EARTH	2081-03-25 17:50	329.6	0.1546956	0.1539935	0.0002341
VENUS	2084-02-02 13:50	68.2	0.0309270	0.0295474	0.0004787
EARTH	2085-02-27 19:26	241.4	0.1647313	0.1644575	0.0000913
EARTH	2089-02-02 10:13	165.2	0.1126792	0.1116426	0.0003455
EARTH	2093-01-19 19:24	6.0	0.0061630	0.0050715	0.0003670
VENUS	2096-09-23 16:33	984.5	0.0075688	0.0057958	0.0064839
EARTH	2097-01-20 12:46	1158.2	0.0386952	0.0119634	0.0089969
EARTH	2101-01-21 14:16	> 1 d	0.0390526	0.0002966	0.0397972
VENUS	2104-09-22 23:37	> 1 d	0.0067705	0.0063317	0.0210878
EARTH	2105-01-24 07:30	> 1 w	0.0631836	0.0001813	0.0963332
EARTH	2109-02-09 04:01	> 1 mo	0.1283919	0.0100110	0.4398680
EARTH	2113-02-27 03:53	> 1 mo	0.1593068	0.0623364	0.2334614
VENUS	2116-01-31 23:29	> 1 mo	0.0241439	0.0241435	0.0034975
EARTH	2117-03-16 18:03	> 1 mo	0.1598724	0.0691227	0.6474161
EARTH	2121-04-02 02:42	> 1 mo	0.1343525	0.0412195	3.3571754
EARTH	2125-04-16 21:48	> 1 mo	0.0852583	0.0359521	7.6256128

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
113.67593992	17.30284672	0.00049980	MINIMUM
241.81016768	111.71558803	0.03481245	MINIMUM
178.55364983	65.16763524	0.16901495	SADDLE
356.14968516	242.90019677	0.43394288	SADDLE
356.05657582	62.74413880	1.56608657	SADDLE
177.91191234	244.70888448	2.16620152	MAXIMUM

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MOID Plots

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