Asteroids

2015GA1 help

Last update: 2025-09-10 00:30 UTC

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.777

Aphelion (Q)

3.207

Eccentricity (e)

0.610

Inclination (i)

5.2

deg

Orbit period (P)

1026.7

Earth MOID

0.00587

U parameter

4.7

Next Earth close approach

Date

2057-08-30

Nominal distance (from Earth center)

0.07708

11530779

Maximum Brightness

24.4

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

26.7

mag

Diameter

12 - 28*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2015-04-11

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

1.991678

1-sigma variation

0.000016

Unit

Eccentricity (e)

Value

0.610036

1-sigma variation

0.000002

Unit

Inclination (i)

Value

5.1565

1-sigma variation

0.0001

Unit

Long. of Ascending Node (Ω)

Value

202.0962

1-sigma variation

0.0001

Unit

Arg. of Perihelion (ω)

Value

70.2013

1-sigma variation

0.0001

Unit

Mean Anomaly (M)

Value

261.85479

1-sigma variation

0.01554

Unit

Perihelion distance

Value

0.776682

1-sigma variation

Unit

Aphelion distance

Value

3.206674

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.032386

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.579203

1-sigma variation

Unit

MOID

Value

0.005871

1-sigma variation

Unit

Orbit Period

Value

1026.6612

1-sigma variation

Unit

U parameter

Value

4.7

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	2.50893E-10	3.71504E-11	7.44326E-10	-1.06613E-9	-8.35791E-10	-2.46119E-7
e	3.71504E-11	5.70674E-12	1.03977E-10	-1.56867E-10	-7.24828E-11	-3.64556E-8
i	7.44326E-10	1.03977E-10	4.09160E-9	-3.05470E-9	-3.88872E-9	-7.29894E-7
Ω	-1.06613E-9	-1.56867E-10	-3.05470E-9	4.68483E-9	3.61377E-9	1.04581E-6
ω	-8.35791E-10	-7.24828E-11	-3.88872E-9	3.61377E-9	1.59037E-8	8.16834E-7
M	-2.46119E-7	-3.64556E-8	-7.29894E-7	1.04581E-6	8.16834E-7	2.41438E-4

Date of computation: 2025-09-10 00:30 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

26.655

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

12 - 28*

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

Radar R

Unit

Source

[3]

Download this part as:

Sources

No.	Name	Additional
[1]	ESA Aegis	ESA orbit determination and impact monitoring system
[2]	Estimation	Estimated from absolute magnitude
[3]	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

Unit

Source

[1]

Unobserved

Value

3805

Unit

Source

[1]

Normalized RMS of residuals

Value

0.379516

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2015-04-10.28915

Unit

Source

[2]

Last Observation

Value

2015-04-15.47051

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

67 (2)

Unit

Source

[1]

Radar Summary

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

Radar

Value

Unit

Source

First Observation

Value

2015-04-18

Unit

Source

[3]

Last Observation

Value

2015-04-18

Unit

Source

[3]

Delay (Discarded)

Value

0 (0)

Unit

Source

[-]

Doppler (Discarded)

Value

1 (0)

Unit

Source

[1]

Total Radar Observations (Discarded)

Value

1 (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 2015GA1 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	1967-05-10 06:53	1345.1	0.1681513	0.1584838	0.0032233
EARTH	1981-09-04 06:23	191.8	0.0704743	0.0684615	0.0007360
EARTH	1984-04-02 01:41	137.3	0.1989697	0.1933755	0.0018647
EARTH	2012-09-13 23:50	15.6	0.1992920	0.1987022	0.0001966
EARTH	2015-04-16 07:12	< 1 min	0.0063985	0.0063981	0.0000001
EARTH	2057-08-30 06:40	269.1	0.0770785	0.0735091	0.0012369
EARTH	2071-09-15 11:36	172.4	0.1957239	0.1891093	0.0022087
EARTH	2074-04-10 05:06	197.3	0.0956327	0.0889780	0.0022189
16 Psyche	2080-09-21 07:30	23.9	0.0176468	0.0161212	0.0005270
EARTH	2088-04-30 03:19	37.4	0.1251832	0.1247185	0.0001549

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
324.40959297	102.87593830	0.00597687	MINIMUM
36.44580341	238.43708101	0.06187282	MINIMUM
1.00369497	171.79283953	0.25002513	SADDLE
0.36141838	350.46287906	1.76008723	SADDLE
180.14990317	350.04735942	2.22896701	SADDLE
180.02030525	169.98530002	4.22109773	MAXIMUM

Download:

MOID Plots

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