Asteroids

391211 2006HZ51 help

Last update: 2026-07-30 09:40 UTC

Orbital Properties

Epoch

61200.0

MJD

Orbit type

Amor

Perihelion (q)

1.045

Aphelion (Q)

2.751

Eccentricity (e)

0.449

Inclination (i)

12.4

deg

Orbit period (P)

955.2

Earth MOID

0.03616

U parameter

0.0

Next Earth close approach

Date

2027-06-30

Nominal distance (from Earth center)

0.08238

12324191

Maximum Brightness

15.5

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

18.5

mag

Diameter

410

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2006-04-27

Observatory

University of Arizona 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

61200.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.898180

1-sigma variation

1.130E-8

Unit

Eccentricity (e)

Value

0.449491

1-sigma variation

4.810E-8

Unit

Inclination (i)

Value

12.4045

1-sigma variation

5.744E-6

Unit

Long. of Ascending Node (Ω)

Value

84.2559

1-sigma variation

3.124E-5

Unit

Arg. of Perihelion (ω)

Value

193.4221

1-sigma variation

3.279E-5

Unit

Mean Anomaly (M)

Value

213.36925

1-sigma variation

0.00002

Unit

Perihelion distance

Value

1.044965

1-sigma variation

Unit

Aphelion distance

Value

2.751395

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

1.706754

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.038119

1-sigma variation

Unit

MOID

Value

0.036165

1-sigma variation

Unit

Orbit Period

Value

955.2226

1-sigma variation

Unit

U parameter

Value

0.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.27770E-16	8.13281E-17	-7.29338E-15	-2.76861E-14	9.84224E-14	-2.06247E-13
e	8.13281E-17	2.31355E-15	1.42630E-14	-2.05700E-13	9.56932E-14	-1.44120E-13
i	-7.29338E-15	1.42630E-14	3.29943E-11	-6.02811E-11	4.59987E-11	2.21274E-11
Ω	-2.76861E-14	-2.05700E-13	-6.02811E-11	9.76024E-10	-9.66373E-10	6.16965E-11
ω	9.84224E-14	9.56932E-14	4.59987E-11	-9.66373E-10	1.07506E-9	-2.25506E-10
M	-2.06247E-13	-1.44120E-13	2.21274E-11	6.16965E-11	-2.25506E-10	3.86704E-10

Date of computation: 2026-07-30 09:40 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

18.485

Unit

mag

Source

[1]

Slope Parameter (G)

Value

0.15**

Unit

Source

[1]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.42

Unit

Source

[2]

Diameter

Value

410

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]	EARN	1.) Nugent, C.R. et al. (2015) Astrophys. J. 814_117 (13pp) (NEOWISE Reactivation Mission Year One: Preliminary Asteroid Diameters and Albedos)(201 NEOs)

Observational Information

Arc Length
Unobserved
Normalized RMS of residuals

Arc Information

Value

Unit

Source

Arc Length

Value

8152

Unit

Source

[1]

Unobserved

Value

936

Unit

Source

[1]

Normalized RMS of residuals

Value

0.58819

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2001-10-14.51431

Unit

Source

[2]

Last Observation

Value

2024-02-08.351462

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

208 (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

Filters

Initial Date: *

Final Date: *

Normalised Only accepted

Max residual (arcsec):

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Plot

Computation parameters

As seen from:

Initial Date: *

Final Date: *

Output option:

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Note: Ephemerides requests are limited to a maximum of 1000 points and a final date not exceeding 2040/12/31 00:00.

Close Approaches for 391211 2006HZ51 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	1993-07-13 16:17	< 1 min	0.1596867	0.1596838	0.0000010
EARTH	2027-06-30 09:48	< 1 min	0.0823821	0.0823801	0.0000007
EARTH	2061-07-14 03:15	< 1 min	0.1579972	0.1579938	0.0000011
EARTH	2082-05-29 12:10	< 1 min	0.1874861	0.1874830	0.0000010
EARTH	2116-06-11 16:05	< 1 min	0.0663870	0.0663859	0.0000004

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
353.35671558	162.17058718	0.03616463	MINIMUM
180.75754862	353.46789568	1.76974537	SADDLE
0.80628849	354.16144683	2.02788276	SADDLE
179.76746795	172.87545687	3.76719764	MAXIMUM

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MOID Plots

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