Asteroids

2017GL4 help

Last update: 2026-03-17 23:26 UTC

Orbital Properties

Epoch

61200.0

MJD

Orbit type

Amor

Perihelion (q)

1.032

Aphelion (Q)

2.817

Eccentricity (e)

0.464

Inclination (i)

5.6

deg

Orbit period (P)

975.4

Earth MOID

0.04000

U parameter

7.4

Next Earth close approach

Date

2033-05-22

Nominal distance (from Earth center)

0.0834

12476804

Maximum Brightness

23.1

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

26.1

mag

Diameter

16 - 40*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2017-04-01

Observatory

Pan-STARRS 1, Haleakala

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

1.924788

1-sigma variation

0.001098

Unit

Eccentricity (e)

Value

0.463636

1-sigma variation

0.000273

Unit

Inclination (i)

Value

5.5711

1-sigma variation

0.0026

Unit

Long. of Ascending Node (Ω)

Value

201.3663

1-sigma variation

0.0055

Unit

Arg. of Perihelion (ω)

Value

24.5547

1-sigma variation

0.0086

Unit

Mean Anomaly (M)

Value

147.02990

1-sigma variation

0.48235

Unit

Perihelion distance

Value

1.032387

1-sigma variation

Unit

Aphelion distance

Value

2.817189

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.060822

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

1.615550

1-sigma variation

Unit

MOID

Value

0.040004

1-sigma variation

Unit

Orbit Period

Value

975.3774

1-sigma variation

Unit

U parameter

Value

7.4

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.20667E-6	2.99445E-7	2.84913E-6	-6.04092E-6	-9.45620E-6	-5.29850E-4
e	2.99445E-7	7.43095E-8	7.07034E-7	-1.49910E-6	-2.34663E-6	-1.31486E-4
i	2.84913E-6	7.07034E-7	6.72728E-6	-1.42636E-5	-2.23275E-5	-1.25106E-3
Ω	-6.04092E-6	-1.49910E-6	-1.42636E-5	3.02428E-5	4.73406E-5	2.65257E-3
ω	-9.45620E-6	-2.34663E-6	-2.23275E-5	4.73406E-5	7.41069E-5	4.15223E-3
M	-5.29850E-4	-1.31486E-4	-1.25106E-3	2.65257E-3	4.15223E-3	2.32658E-1

Date of computation: 2026-03-17 23:26 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

26.063

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

16 - 40*

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

3299

Unit

Source

[1]

Normalized RMS of residuals

Value

0.473807

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2017-03-21.38988

Unit

Source

[2]

Last Observation

Value

2017-04-26.47628

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

28 (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

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 2017GL4 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	2009-04-05 20:23	> 1 d	0.1270466	0.0814940	0.0152866
EARTH	2017-04-20 05:48	< 1 min	0.0447388	0.0447103	0.0000095
EARTH	2025-05-02 12:20	> 1 d	0.0449195	0.0345416	0.0054554
EARTH	2033-05-22 20:25	> 1 w	0.0834023	0.0321263	0.0350897
EARTH	2041-06-12 10:25	> 1 w	0.1772552	0.0690561	0.0765283
EARTH	2108-04-01 15:46	> 1 w	0.1962533	0.0130497	0.1076816
EARTH	2116-04-16 10:13	> 1 w	0.0664710	0.0331944	0.0582605
EARTH	2124-04-23 20:55	> 1 d	0.0420843	0.0391002	0.0026378

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
353.65414711	113.22017408	0.03886420	MINIMUM
180.75573707	305.27128318	1.82775801	SADDLE
1.66241789	306.50321738	2.02290146	SADDLE
180.45040723	125.09334455	3.82737186	MAXIMUM

Download:

MOID Plots

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