Asteroids

164400 2005GN59 help

Last update: 2025-07-11 12:57 UTC

Orbital Properties

Epoch

60800.0

MJD

Orbit type

Apollo

Perihelion (q)

0.882

Aphelion (Q)

2.432

Eccentricity (e)

0.468

Inclination (i)

6.6

deg

Orbit period (P)

778.8

Earth MOID

0.04955

U parameter

0.0

Next Earth close approach

Date

2025-12-27

Nominal distance (from Earth center)

0.10629

15900425

Maximum Brightness

16.7

mag

Risk

Object is not in risk list

Object is not in priority list

Physical Properties

Absolute Magnitude (H)

17.3

mag

Diameter

900 - 2000*

Taxonomic type

Sq/Q

Rotation period (T)

38.71

Discovery Information

Discovery Date

2005-04-07

Observatory

Steward Observatory, Kitt Peak-Spacewatch

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

60800.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.656639

1-sigma variation

1.472E-9

Unit

Eccentricity (e)

Value

0.467860

1-sigma variation

1.375E-8

Unit

Inclination (i)

Value

6.6258

1-sigma variation

2.815E-6

Unit

Long. of Ascending Node (Ω)

Value

218.9566

1-sigma variation

1.341E-5

Unit

Arg. of Perihelion (ω)

Value

203.0671

1-sigma variation

1.358E-5

Unit

Mean Anomaly (M)

Value

262.14233

1-sigma variation

3.593E-6

Unit

Perihelion distance

Value

0.881565

1-sigma variation

Unit

Aphelion distance

Value

2.431714

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

1.265129

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.087829

1-sigma variation

Unit

MOID

Value

0.049552

1-sigma variation

Unit

Orbit Period

Value

778.8260

1-sigma variation

Unit

U parameter

Value

0.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	2.16639E-18	3.08397E-18	1.14596E-16	-5.00400E-16	2.25177E-15	-5.11416E-15
e	3.08397E-18	1.89068E-16	4.67388E-15	-2.82907E-14	4.78807E-14	-1.06266E-14
i	1.14596E-16	4.67388E-15	7.92591E-12	-3.31921E-11	3.30551E-11	1.38414E-13
Ω	-5.00400E-16	-2.82907E-14	-3.31921E-11	1.79712E-10	-1.77024E-10	-1.71439E-12
ω	2.25177E-15	4.78807E-14	3.30551E-11	-1.77024E-10	1.84303E-10	-4.91674E-12
M	-5.11416E-15	-1.06266E-14	1.38414E-13	-1.71439E-12	-4.91674E-12	1.29125E-11

Date of computation: 2025-07-11 12:57 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

38.71

38.69

Unit

Source

[1]

[4]

[5]

Quality

Value

3,D

Unit

Source

[5]

[4]

Amplitude

Value

0.7

1.34

1.27

Unit

mag

Source

[5]

[4]

[1]

Rotation Direction

Value

Unit

Source

[-]

Spinvector L

Value

345

Unit

Source

[1]

Spinvector B

Value

Unit

Source

[1]

Taxonomy
Taxonomy (all)

Taxonomy

Value

Unit

Source

Taxonomy

Value

Sq/Q

Unit

Source

[2]

Taxonomy (all)

Value

Q,Sq

Unit

Source

[3]

Absolute Magnitude (H)
Slope Parameter (G)

H / G

Value

Unit

Source

Absolute Magnitude (H)

Value

17.328

Unit

mag

Source

[6]

Slope Parameter (G)

Value

0.15**

Unit

mag

Source

[6]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.05 - 0.25

Unit

Source

[7]

Diameter

Value

900 - 2000*

Unit

Source

[7]

Color Index Information

Color Index Information

Value

Unit

Source

Color Index Information

Value

Unit

mag

Source

[-]

Sightings

Sightings

Value

Unit

Source

Sightings

Value

Visual S

Radar R

Unit

Source

[8]

[9]

Download this part as:

Sources

No.	Name	Additional
[1]	EARN	1.) Lowell Observatory Near-Earth Asteroid Photometric Survey (NEAPS): Paper 3. Skiff, Brian A et al.
[2]	EARN	1.) DeMeo, F.E. et al. (2014) Icarus 227, 112-122. (Mars encounters cause fresh surfaces on some near-Earth asteroids) (contains taxonomic classification of 249 NEAs)
[3]	EARN	1.) Thomas, C.A. et al. (2014) Icarus 228, 217-246. (Physical characterization of Warm Spitzer-observed near-Earth objects) 2.) DeMeo, F.E. et al. (2014) Icarus 227, 112-122. (Mars encounters cause fresh surfaces on some near-Earth asteroids) (contains taxonomic classification of 249 NEAs)
[4]	EARN	1.) Skiff, B.A. et al. (2012) MPB 39, 111-130. (LOWELL OBSERVATORY NEAR-EARTH ASTEROID PHOTOMETRIC SURVEY (NEAPS) - 2008 MAY THROUGH 2008 DECEMBER) (46 NEAs) 2.) VanderHaagen G.A. (2011) MPB 38, 10-11. (LIGHTCURVE FOR NEAR-EARTH ASTEROID (164400) 2005 GN59)
[5]	EARN	1.) B.Warner, CALL website
[6]	ESA Aegis	ESA orbit determination and impact monitoring system
[7]	Estimation	Estimated from absolute magnitude
[8]	EARN	1.) Popescu, M. et al. (2011) Astron. Astrophys. 535, A15. (Spectral properties of eight near-Earth asteroids) (1917, 8567,16960,164400,188452,2001SG286,2010TD54)
[9]	EARN	1.) href="http://echo.jpl.nasa.gov/asteroids/index.html">JPL's NEO Radar Detection Program Webpage

Observational Information

Arc Length
Unobserved
Normalized RMS of residuals

Arc Information

Value

Unit

Source

Arc Length

Value

17122

Unit

Source

[1]

Unobserved

Value

Unit

Source

[1]

Normalized RMS of residuals

Value

0.434436

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

1978-08-24.38926

Unit

Source

[2]

Last Observation

Value

2025-07-10.462312

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

1105 (6)

Unit

Source

[1]

Radar Summary

First Observation
Last Observation
Delay (Discarded)
Doppler (Discarded)
Total Optical Observations (Discarded)

Radar

Value

Unit

Source

First Observation

Value

2008-10-07

Unit

Source

[3]

Last Observation

Value

2008-10-09

Unit

Source

[3]

Delay (Discarded)

Value

1 (0)

Unit

Source

[1]

Doppler (Discarded)

Value

2 (0)

Unit

Source

[1]

Total Radar Observations (Discarded)

Value

3 (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 164400 2005GN59 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	1962-01-03 07:35	< 1 min	0.1033417	0.1033415	0.0000001
EARTH	1976-10-07 05:48	< 1 min	0.0514286	0.0514285	0.0000000
EARTH	1994-01-06 01:46	< 1 min	0.1048225	0.1048223	0.0000001
EARTH	2008-10-06 18:36	< 1 s	0.0515854	0.0515853	0.0000000
EARTH	2025-12-27 20:52	< 1 min	0.1062878	0.1062876	0.0000001
EARTH	2040-09-25 06:05	< 1 min	0.1265728	0.1265721	0.0000002
EARTH	2057-11-20 03:56	< 1 min	0.1118048	0.1118047	0.0000001
EARTH	2075-01-20 03:42	< 1 min	0.1557764	0.1557759	0.0000002
EARTH	2089-10-15 08:07	< 1 min	0.0558920	0.0558919	0.0000000
EARTH	2107-01-11 21:57	< 1 min	0.1096862	0.1096860	0.0000001
EARTH	2121-10-12 22:51	< 1 min	0.0483912	0.0483912	0.0000000

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
331.21645441	274.71627578	0.04955202	MINIMUM
25.17476235	0.32625335	0.10433294	MINIMUM
5.41678287	329.14048037	0.11599514	SADDLE
179.89290013	139.33639256	1.42113924	SADDLE
358.92406630	138.58778906	1.89338706	SADDLE
179.38357970	319.03586548	3.41853714	MAXIMUM

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MOID Plots

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