Asteroids

2011EH17 help

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

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Aten

Perihelion (q)

0.249

Aphelion (Q)

1.213

Eccentricity (e)

0.660

Inclination (i)

3.0

deg

Orbit period (P)

228.2

Earth MOID

0.00745

U parameter

1.2

Next Earth close approach

Date

2026-03-02

Nominal distance (from Earth center)

0.04057

6069264

Maximum Brightness

19.7

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

24.8

mag

Diameter

29 - 60*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2011-03-06

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

0.730897

1-sigma variation

5.959E-9

Unit

Eccentricity (e)

Value

0.659796

1-sigma variation

1.743E-7

Unit

Inclination (i)

Value

2.9975

1-sigma variation

2.261E-5

Unit

Long. of Ascending Node (Ω)

Value

333.0170

1-sigma variation

0.0002

Unit

Arg. of Perihelion (ω)

Value

36.0351

1-sigma variation

0.0001

Unit

Mean Anomaly (M)

Value

295.82044

1-sigma variation

0.00007

Unit

Perihelion distance

Value

0.248654

1-sigma variation

Unit

Aphelion distance

Value

1.213139

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.742287

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.104901

1-sigma variation

Unit

MOID

Value

0.007450

1-sigma variation

Unit

Orbit Period

Value

228.2351

1-sigma variation

Unit

U parameter

Value

1.2

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	3.55153E-17	-7.65665E-16	-9.45042E-14	-9.06796E-13	7.32876E-13	3.87104E-13
e	-7.65665E-16	3.03843E-14	2.46803E-12	2.06817E-11	-1.71563E-11	-9.93460E-12
i	-9.45042E-14	2.46803E-12	5.11107E-10	3.45007E-9	-3.00842E-9	-1.04247E-9
Ω	-9.06796E-13	2.06817E-11	3.45007E-9	2.81909E-8	-2.37449E-8	-1.00884E-8
ω	7.32876E-13	-1.71563E-11	-3.00842E-9	-2.37449E-8	2.01927E-8	8.11637E-9
M	3.87104E-13	-9.93460E-12	-1.04247E-9	-1.00884E-8	8.11637E-9	4.68699E-9

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

24.807

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

29 - 60*

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

4426

Unit

Source

[1]

Unobserved

Value

1020

Unit

Source

[1]

Normalized RMS of residuals

Value

0.676056

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2011-03-06.29397

Unit

Source

[2]

Last Observation

Value

2023-04-18.235383

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

69 (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 2011EH17 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	1954-03-05 21:44	< 1 min	0.1967678	0.1967586	0.0000031
MERCURY	1964-09-16 18:57	< 1 min	0.0453766	0.0453616	0.0000050
MERCURY	1967-11-05 01:52	< 1 min	0.0341721	0.0341586	0.0000045
EARTH	1968-04-23 10:00	< 1 min	0.1449842	0.1449779	0.0000021
VENUS	1969-03-02 07:42	< 1 min	0.0286176	0.0286151	0.0000008
MERCURY	1970-12-22 09:39	< 1 min	0.0391689	0.0391565	0.0000041
EARTH	1971-03-16 20:26	< 1 min	0.1912780	0.1912753	0.0000009
EARTH	1973-04-24 20:01	< 1 min	0.1028821	0.1028767	0.0000018
MERCURY	1974-02-07 11:58	< 1 min	0.0468960	0.0468848	0.0000038
EARTH	1976-03-12 08:02	< 1 min	0.1723232	0.1723201	0.0000010
EARTH	1978-04-25 19:13	< 1 s	0.0713054	0.0713015	0.0000013
EARTH	1981-03-09 20:24	< 1 min	0.1538630	0.1538601	0.0000010
EARTH	1983-04-26 09:03	< 1 min	0.0530517	0.0530497	0.0000007
EARTH	1986-03-08 01:41	< 1 min	0.1366256	0.1366233	0.0000008
EARTH	1988-04-25 16:56	< 1 min	0.0473979	0.0473970	0.0000003
EARTH	1991-03-06 20:51	< 1 min	0.1217409	0.1217393	0.0000005
EARTH	1993-04-25 20:27	< 1 min	0.0514001	0.0513993	0.0000003
EARTH	1996-03-04 11:37	< 1 min	0.1012894	0.1012885	0.0000003
EARTH	1998-04-25 16:03	< 1 min	0.0659676	0.0659666	0.0000003
EARTH	2001-03-03 09:44	< 1 min	0.0771832	0.0771829	0.0000001
EARTH	2003-04-25 03:45	< 1 min	0.0839553	0.0839539	0.0000005
VENUS	2006-01-30 10:15	< 1 min	0.0400145	0.0400135	0.0000003
EARTH	2006-03-02 23:40	< 1 min	0.0593613	0.0593607	0.0000002
EARTH	2008-04-23 18:29	< 1 min	0.0956594	0.0956577	0.0000006
EARTH	2011-03-02 20:08	< 1 min	0.0443279	0.0443268	0.0000004
MERCURY	2011-08-01 09:55	< 1 min	0.0368926	0.0368887	0.0000013
EARTH	2013-04-23 08:17	< 1 min	0.1059436	0.1059416	0.0000006
MERCURY	2014-09-15 20:22	< 1 min	0.0163778	0.0163758	0.0000007
MERCURY	2016-01-08 08:01	< 1 min	0.0333872	0.0333808	0.0000021
EARTH	2016-03-01 21:56	< 1 min	0.0352372	0.0352360	0.0000004
EARTH	2018-04-23 06:04	< 1 min	0.1100986	0.1100967	0.0000006
MERCURY	2019-02-22 05:39	< 1 min	0.0399118	0.0399062	0.0000019
EARTH	2021-03-02 03:35	< 1 min	0.0341599	0.0341591	0.0000003
EARTH	2023-04-23 14:24	< 1 min	0.1083096	0.1083082	0.0000005
EARTH	2026-03-02 13:15	< 1 min	0.0405705	0.0405703	0.0000001
EARTH	2028-04-23 09:43	< 1 min	0.0998561	0.0998551	0.0000003
EARTH	2031-03-03 02:37	< 1 min	0.0535963	0.0535954	0.0000003
EARTH	2033-04-24 03:28	< 1 min	0.0919371	0.0919362	0.0000003
MERCURY	2034-09-14 13:11	< 1 min	0.0397385	0.0397374	0.0000004
EARTH	2036-03-02 14:51	< 1 min	0.0617984	0.0617968	0.0000005
MERCURY	2037-10-29 01:05	< 1 min	0.0263387	0.0263376	0.0000004
EARTH	2038-04-24 17:42	< 1 min	0.0856238	0.0856228	0.0000003
MERCURY	2039-02-20 03:50	< 1 min	0.0071675	0.0071653	0.0000007
EARTH	2041-03-03 08:07	< 1 min	0.0730814	0.0730796	0.0000006
EARTH	2043-04-25 12:46	< 1 min	0.0725905	0.0725897	0.0000003
VENUS	2045-06-14 06:06	< 1 min	0.0294826	0.0294822	0.0000001
EARTH	2046-03-04 19:15	< 1 min	0.0959008	0.0958994	0.0000005
EARTH	2048-04-25 09:36	< 1 min	0.0543864	0.0543856	0.0000003
EARTH	2051-03-06 17:00	< 1 min	0.1181381	0.1181366	0.0000005
EARTH	2053-04-25 21:25	< 1 min	0.0462765	0.0462756	0.0000003
MERCURY	2054-09-07 12:17	< 1 min	0.0325658	0.0325639	0.0000006
MERCURY	2055-12-29 23:43	< 1 min	0.0316112	0.0316075	0.0000012
EARTH	2056-03-08 05:04	< 1 min	0.1402595	0.1402580	0.0000005
EARTH	2058-04-26 01:27	< 1 min	0.0556214	0.0556202	0.0000004
EARTH	2061-03-11 17:34	< 1 min	0.1640809	0.1640793	0.0000005
EARTH	2063-04-25 18:39	< 1 min	0.0858535	0.0858515	0.0000007
EARTH	2066-03-15 22:08	< 1 min	0.1852638	0.1852624	0.0000005
EARTH	2068-04-24 01:11	< 1 min	0.1267489	0.1267463	0.0000009
MERCURY	2068-05-30 18:15	< 1 min	0.0321032	0.0320992	0.0000013
MERCURY	2069-09-20 13:30	< 1 min	0.0440018	0.0439951	0.0000023
EARTH	2073-04-22 20:31	< 1 min	0.1759412	0.1759382	0.0000010
MERCURY	2079-01-08 08:16	< 1 min	0.0477678	0.0477630	0.0000016
MERCURY	2082-02-20 06:06	< 1 min	0.0475051	0.0475001	0.0000017
VENUS	2089-02-17 08:28	< 1 min	0.0314187	0.0314178	0.0000003
EARTH	2089-03-06 00:16	< 1 min	0.1887125	0.1887096	0.0000010
MERCURY	2092-09-28 18:25	< 1 min	0.0225332	0.0225303	0.0000010
MERCURY	2094-01-20 02:34	< 1 min	0.0231983	0.0231914	0.0000023
EARTH	2094-03-04 15:12	< 1 min	0.1351018	0.1350989	0.0000010
EARTH	2096-04-11 11:12	< 1 min	0.1920041	0.1920031	0.0000003
EARTH	2099-03-03 17:12	< 1 min	0.0872451	0.0872430	0.0000007
EARTH	2101-04-16 19:01	< 1 min	0.1728907	0.1728897	0.0000003
EARTH	2104-03-03 06:20	< 1 min	0.0451322	0.0451309	0.0000004
EARTH	2106-04-20 02:30	< 1 min	0.1538415	0.1538406	0.0000003
MERCURY	2106-06-22 21:53	< 1 min	0.0210150	0.0210138	0.0000004
MERCURY	2107-10-14 15:54	< 1 min	0.0348535	0.0348506	0.0000010
EARTH	2109-03-03 07:31	< 1 min	0.0194679	0.0194675	0.0000001
EARTH	2111-04-21 14:22	< 1 min	0.1452839	0.1452828	0.0000004
EARTH	2114-03-03 14:03	< 1 min	0.0176204	0.0176195	0.0000003
EARTH	2116-04-20 06:03	< 1 min	0.1513227	0.1513213	0.0000005
EARTH	2119-03-04 01:53	< 1 min	0.0458674	0.0458659	0.0000005
EARTH	2121-04-17 11:40	< 1 min	0.1723218	0.1723203	0.0000005
EARTH	2124-03-04 04:08	< 1 min	0.0922485	0.0922469	0.0000005

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
122.69714065	59.09269290	0.00744952	MINIMUM
234.89843411	113.27397546	0.04680699	MINIMUM
179.47299219	86.65448578	0.21594599	SADDLE
355.59789592	261.95029805	0.75373709	SADDLE
355.58377599	81.89953278	1.24771742	SADDLE
179.03157417	266.45313769	2.21447035	MAXIMUM

Download:

MOID Plots

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