Asteroids

2018RH6 help

Last update: 2025-11-24 16:53 UTC

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Aten

Perihelion (q)

0.761

Aphelion (Q)

1.212

Eccentricity (e)

0.229

Inclination (i)

3.0

deg

Orbit period (P)

357.9

Earth MOID

0.01282

U parameter

5.8

Next Earth close approach

Date

2060-04-28

Nominal distance (from Earth center)

0.0983

14705264

Maximum Brightness

25.8

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

27.5

mag

Diameter

9 - 19*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2018-09-13

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

61000.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

0.986461

1-sigma variation

0.000018

Unit

Eccentricity (e)

Value

0.228952

1-sigma variation

0.000203

Unit

Inclination (i)

Value

2.9672

1-sigma variation

0.0033

Unit

Long. of Ascending Node (Ω)

Value

345.4976

1-sigma variation

0.0006

Unit

Arg. of Perihelion (ω)

Value

122.1521

1-sigma variation

0.0047

Unit

Mean Anomaly (M)

Value

26.73724

1-sigma variation

0.07255

Unit

Perihelion distance

Value

0.760609

1-sigma variation

Unit

Aphelion distance

Value

1.212313

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.056274

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.159830

1-sigma variation

Unit

MOID

Value

0.012824

1-sigma variation

Unit

Orbit Period

Value

357.8643

1-sigma variation

Unit

U parameter

Value

5.8

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	3.08149E-10	3.51759E-9	5.68641E-8	-8.46243E-9	7.81569E-8	-1.27265E-6
e	3.51759E-9	4.13828E-8	6.72908E-7	-8.76190E-8	9.43383E-7	-1.44316E-5
i	5.68641E-8	6.72908E-7	1.09557E-5	-1.38491E-6	1.54122E-5	-2.32990E-4
Ω	-8.46243E-9	-8.76190E-8	-1.38491E-6	3.03722E-7	-1.77693E-6	3.56505E-5
ω	7.81569E-8	9.43383E-7	1.54122E-5	-1.77693E-6	2.19621E-5	-3.18786E-4
M	-1.27265E-6	-1.44316E-5	-2.32990E-4	3.56505E-5	-3.18786E-4	5.26353E-3

Date of computation: 2025-11-24 16:53 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

27.462

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

9 - 19*

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

2635

Unit

Source

[1]

Normalized RMS of residuals

Value

0.505698

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2018-09-13.1979

Unit

Source

[2]

Last Observation

Value

2018-09-18.24928

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

33 (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 2018RH6 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	1967-05-01 02:11	193.6	0.1290564	0.1249291	0.0013758
EARTH	1968-04-24 08:55	89.7	0.0449742	0.0432849	0.0005643
EARTH	1969-03-15 10:28	> 1 d	0.1574719	0.1536914	0.0012621
EARTH	1969-05-25 08:53	> 1 d	0.1517572	0.1478994	0.0012873
EARTH	1970-06-28 10:06	> 1 d	0.1962429	0.1944793	0.0005883
EARTH	1971-07-26 04:10	> 1 d	0.1923680	0.1898485	0.0008401
EARTH	1972-08-26 14:30	> 1 d	0.1403544	0.1283710	0.0040044
EARTH	1972-11-01 06:56	> 1 d	0.1602378	0.1472420	0.0043319
EARTH	1973-09-22 13:16	3.1	0.0199703	0.0120757	0.0065161
EARTH	1974-09-19 05:55	363.9	0.1123284	0.0892412	0.0077066
VENUS	1980-10-22 09:27	545.9	0.0422063	0.0417601	0.0002859
EARTH	2012-04-27 16:20	121.7	0.0812589	0.0758533	0.0018256
EARTH	2013-04-23 03:55	10.8	0.0744874	0.0694726	0.0016945
EARTH	2014-03-03 19:41	> 1 d	0.1759510	0.1732988	0.0008862
EARTH	2014-06-04 08:30	1159.4	0.1687644	0.1662835	0.0008273
EARTH	2015-07-03 10:54	812.1	0.1991088	0.1981637	0.0003152
EARTH	2016-07-28 13:21	536.8	0.1894797	0.1892959	0.0000614
EARTH	2017-08-28 12:32	260.5	0.1363517	0.1361082	0.0000812
EARTH	2017-10-29 18:38	382.6	0.1553198	0.1550030	0.0001056
EARTH	2018-09-22 20:54	< 1 min	0.0220130	0.0219470	0.0000220
EARTH	2019-09-20 07:39	12.2	0.0973850	0.0966326	0.0002508
EARTH	2060-04-28 03:16	243.9	0.0982986	0.0880051	0.0034685
EARTH	2061-04-23 10:29	164.6	0.0522433	0.0461702	0.0022723
EARTH	2062-03-15 03:33	> 1 d	0.1559902	0.1499132	0.0020435
EARTH	2062-05-24 09:43	> 1 d	0.1506854	0.1449943	0.0019001
EARTH	2063-06-23 21:05	> 1 d	0.1938100	0.1924096	0.0004680
EARTH	2064-07-17 07:34	> 1 d	0.1986114	0.1970593	0.0005188
EARTH	2065-08-12 01:53	> 1 d	0.1692756	0.1644126	0.0016238
EARTH	2065-11-22 01:10	> 1 d	0.1893429	0.1843463	0.0016656
EARTH	2066-09-16 03:36	1307.2	0.0903251	0.0798148	0.0035117
EARTH	2067-09-22 08:09	138.0	0.0339209	0.0245132	0.0032643
EARTH	2068-09-16 15:22	102.7	0.1684636	0.1626293	0.0019451
VENUS	2071-11-11 08:18	597.9	0.0435599	0.0393228	0.0017298
EARTH	2104-05-04 15:35	1203.8	0.1989209	0.1324812	0.0223987
EARTH	2105-04-28 17:25	1235.7	0.0699048	0.0401360	0.0164887
EARTH	2106-04-25 06:17	573.8	0.0839813	0.0482292	0.0137545
EARTH	2107-03-02 23:01	> 1 w	0.1796756	0.1658216	0.0047056
EARTH	2107-06-08 02:13	> 1 d	0.1716776	0.1580996	0.0045481
EARTH	2108-07-05 06:22	> 1 d	0.1991861	0.1951384	0.0013543
EARTH	2109-07-30 21:50	1246.9	0.1882959	0.1835353	0.0015869
VENUS	2110-01-02 09:26	955.2	0.0429785	0.0409450	0.0012184
EARTH	2110-08-30 17:27	> 1 d	0.1360126	0.1158816	0.0067337
EARTH	2110-10-31 07:24	> 1 w	0.1548539	0.1330243	0.0072781
EARTH	2111-09-24 17:07	190.9	0.0268042	0.0141562	0.0139557
EARTH	2112-09-21 01:44	1172.4	0.0952923	0.0402305	0.0186991

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
265.00733144	258.26601110	0.01297127	MINIMUM
93.12691873	110.75723430	0.03946367	MINIMUM
178.76446042	184.53390539	0.20206246	SADDLE
359.10122016	4.22655214	0.22629526	SADDLE
0.36646700	185.78764869	1.77646627	SADDLE
180.46507917	5.89767491	2.19547600	MAXIMUM

Download:

MOID Plots

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