Asteroids

2015FF help

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

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.839

Aphelion (Q)

1.688

Eccentricity (e)

0.336

Inclination (i)

2.1

deg

Orbit period (P)

518.9

Earth MOID

0.00382

U parameter

8.3

Next Earth close approach

Date

2032-05-26

Nominal distance (from Earth center)

0.17575

26291603

Maximum Brightness

38.4

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

26.9

mag

Diameter

11 - 25*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2015-03-16

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

61000.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.263687

1-sigma variation

0.001443

Unit

Eccentricity (e)

Value

0.335710

1-sigma variation

0.000492

Unit

Inclination (i)

Value

2.0978

1-sigma variation

0.0054

Unit

Long. of Ascending Node (Ω)

Value

6.2500

1-sigma variation

0.1065

Unit

Arg. of Perihelion (ω)

Value

242.1813

1-sigma variation

0.2363

Unit

Mean Anomaly (M)

Value

148.07028

1-sigma variation

2.26466

Unit

Perihelion distance

Value

0.839455

1-sigma variation

Unit

Aphelion distance

Value

1.687919

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.327302

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.029533

1-sigma variation

Unit

MOID

Value

0.003823

1-sigma variation

Unit

Orbit Period

Value

518.8690

1-sigma variation

Unit

U parameter

Value

8.3

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	2.08163E-6	7.09143E-7	7.75356E-6	-1.53702E-4	3.40994E-4	-3.26742E-3
e	7.09143E-7	2.41582E-7	2.64140E-6	-5.23611E-5	1.16165E-4	-1.11310E-3
i	7.75356E-6	2.64140E-6	2.88809E-5	-5.72503E-4	1.27012E-3	-1.21703E-2
Ω	-1.53702E-4	-5.23611E-5	-5.72503E-4	1.13489E-2	-2.51780E-2	2.41257E-1
ω	3.40994E-4	1.16165E-4	1.27012E-3	-2.51780E-2	5.58585E-2	-5.35238E-1
M	-3.26742E-3	-1.11310E-3	-1.21703E-2	2.41257E-1	-5.35238E-1	5.12868E0

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

26.892

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

11 - 25*

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

3834

Unit

Source

[1]

Normalized RMS of residuals

Value

0.598782

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2015-03-16.41812

Unit

Source

[2]

Last Observation

Value

2015-03-20.68009

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

24 (1)

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 2015FF 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	1952-04-13 23:48	> 1 mo	0.1189170	0.0147379	0.0912791
EARTH	1962-05-20 23:33	> 1 mo	0.1711479	0.1318317	0.0138396
EARTH	1972-07-01 06:40	> 1 w	0.1511394	0.0939851	0.0193636
EARTH	1982-08-09 07:03	> 1 d	0.0358210	0.0270729	0.0070963
EARTH	1992-08-15 04:16	> 1 d	0.0565765	0.0269828	0.0142049
MARS	1994-11-06 21:04	382.6	0.0493461	0.0188331	0.0125963
EARTH	1995-03-10 07:57	1254.3	0.1698821	0.1130792	0.0189399
EARTH	2002-08-22 13:28	> 1 d	0.1613564	0.0946276	0.0224635
EARTH	2005-03-16 06:30	> 1 d	0.0626034	0.0046304	0.0226511
MARS	2005-09-16 13:51	1236.0	0.0329773	0.0322521	0.0036683
EARTH	2015-03-20 20:27	< 1 s	0.0106677	0.0106483	0.0000065
EARTH	2022-08-12 19:07	> 1 d	0.0273381	0.0268485	0.0029914
EARTH	2032-05-26 03:30	> 1 mo	0.1757485	0.1496358	0.0095802
EARTH	2042-03-17 23:09	> 1 w	0.0457635	0.0037181	0.2089334
EARTH	2049-07-25 09:57	> 1 mo	0.1107337	0.0256472	0.0907343
EARTH	2059-03-28 22:22	> 1 mo	0.0587975	0.0042982	0.4946417
EARTH	2066-08-15 14:47	> 1 mo	0.0347480	0.0265185	0.2560286
EARTH	2076-06-10 19:33	> 1 mo	0.1748752	0.1177943	0.0200554
EARTH	2086-03-29 21:30	> 1 w	0.0625062	0.0102164	0.0457153
EARTH	2093-08-22 15:47	> 1 w	0.1378788	0.0261227	0.1943909
EARTH	2096-03-10 03:58	> 1 w	0.1788819	0.0012368	0.2405094
EARTH	2103-08-02 16:25	> 1 mo	0.0897448	0.0256810	0.2605082
EARTH	2113-05-22 20:37	> 1 mo	0.1730683	0.0940375	0.0384186
EARTH	2123-03-23 15:23	> 1 w	0.0026811	0.0025639	0.0491162

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
309.14297628	77.31353591	0.00372458	MINIMUM
54.05431040	218.56937762	0.02685092	MINIMUM
2.14164436	148.64189914	0.17689780	SADDLE
180.95375608	327.16179043	0.70319433	SADDLE
1.68067809	327.99358716	1.82540554	SADDLE
180.82393053	147.07914099	2.70146740	MAXIMUM

Download:

MOID Plots

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