Asteroids

2012FC71 help

Last update: 2026-06-04 23:11 UTC

Orbital Properties

Epoch

61200.0

MJD

Orbit type

Aten

Perihelion (q)

0.901

Aphelion (Q)

1.075

Eccentricity (e)

0.088

Inclination (i)

4.9

deg

Orbit period (P)

358.5

Earth MOID

0.05647

U parameter

5.3

Next Earth close approach

Date

2064-01-17

Nominal distance (from Earth center)

0.12964

19393857

Maximum Brightness

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

25.3

mag

Diameter

23 - 50*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2012-03-31

Observatory

University of Arizona 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

61200.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

0.987690

1-sigma variation

0.000008

Unit

Eccentricity (e)

Value

0.088057

1-sigma variation

0.000159

Unit

Inclination (i)

Value

4.9401

1-sigma variation

0.0107

Unit

Long. of Ascending Node (Ω)

Value

38.1144

1-sigma variation

0.0012

Unit

Arg. of Perihelion (ω)

Value

348.4487

1-sigma variation

0.0215

Unit

Mean Anomaly (M)

Value

323.87623

1-sigma variation

0.09773

Unit

Perihelion distance

Value

0.900717

1-sigma variation

Unit

Aphelion distance

Value

1.074663

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.091063

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.065946

1-sigma variation

Unit

MOID

Value

0.056475

1-sigma variation

Unit

Orbit Period

Value

358.5331

1-sigma variation

Unit

U parameter

Value

5.3

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	6.48434E-11	-1.28086E-9	-8.60512E-8	9.70725E-9	1.72305E-7	-7.86715E-7
e	-1.28086E-9	2.53712E-8	1.70471E-6	-1.92360E-7	-3.41086E-6	1.55501E-5
i	-8.60512E-8	1.70471E-6	1.14549E-4	-1.29394E-5	-2.29303E-4	1.04491E-3
Ω	9.70725E-9	-1.92360E-7	-1.29394E-5	1.49108E-6	2.61200E-5	-1.18225E-4
ω	1.72305E-7	-3.41086E-6	-2.29303E-4	2.61200E-5	4.61377E-4	-2.09528E-3
M	-7.86715E-7	1.55501E-5	1.04491E-3	-1.18225E-4	-2.09528E-3	9.55134E-3

Date of computation: 2026-06-04 23:11 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

25.277

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

23 - 50*

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]	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

5175

Unit

Source

[1]

Normalized RMS of residuals

Value

0.641271

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2012-03-31.37492

Unit

Source

[2]

Last Observation

Value

2012-04-21.36231

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

35 (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

Filters

Initial Date: *

Final Date: *

Normalised Only accepted

Max residual (arcsec):

* - these fields are required

Plot

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 2012FC71 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	1955-01-20 12:21	287.2	0.1401216	0.1282143	0.0040585
EARTH	1955-12-31 05:55	> 1 d	0.0797024	0.0774587	0.0010697
EARTH	1956-11-19 10:30	> 1 d	0.0811975	0.0805402	0.0004157
EARTH	1957-03-27 00:01	> 1 d	0.0881119	0.0863003	0.0007247
EARTH	1957-10-15 11:42	> 1 d	0.0980916	0.0970478	0.0004678
EARTH	1958-05-01 05:06	> 1 d	0.0687045	0.0661443	0.0010115
EARTH	1958-09-05 18:44	> 1 d	0.1092068	0.1089378	0.0001739
EARTH	1959-06-01 16:12	1433.3	0.0585975	0.0577646	0.0005562
EARTH	1960-06-13 18:44	126.1	0.1176808	0.1084711	0.0031397
EARTH	2009-01-21 15:59	13.2	0.1692354	0.1689172	0.0001063
EARTH	2010-01-09 14:27	41.9	0.0903856	0.0900259	0.0001202
EARTH	2010-12-01 01:21	110.5	0.0778796	0.0774077	0.0001574
EARTH	2011-03-11 19:48	70.5	0.0912534	0.0906864	0.0001890
EARTH	2011-10-26 02:00	73.7	0.0930606	0.0925114	0.0001831
EARTH	2012-04-18 21:03	4.8	0.0761202	0.0756697	0.0001502
EARTH	2012-09-18 18:28	16.0	0.1074310	0.1068057	0.0002084
EARTH	2013-05-21 20:51	37.5	0.0574218	0.0570656	0.0001188
EARTH	2014-06-11 14:18	22.5	0.0903395	0.0900163	0.0001079
EARTH	2015-06-13 22:39	13.2	0.1799776	0.1795333	0.0001482
EARTH	2064-01-17 16:30	287.5	0.1296399	0.1205363	0.0031316
EARTH	2064-12-24 14:07	> 1 d	0.0776154	0.0773092	0.0003253
EARTH	2065-11-14 02:46	> 1 d	0.0833980	0.0815934	0.0007733
EARTH	2066-03-27 22:03	> 1 d	0.0870076	0.0862261	0.0003684
EARTH	2066-10-10 09:56	> 1 d	0.1000043	0.0979268	0.0008065
EARTH	2067-05-01 16:32	> 1 d	0.0679131	0.0661393	0.0007559
EARTH	2067-08-30 20:33	> 1 d	0.1089372	0.1087637	0.0001351
EARTH	2068-05-31 16:38	1355.8	0.0602388	0.0581686	0.0010067
EARTH	2069-06-12 10:24	68.3	0.1221864	0.1107524	0.0038827
EARTH	2118-01-21 02:30	708.4	0.1707047	0.1299453	0.0143618
EARTH	2119-01-10 00:00	> 1 d	0.0908906	0.0805088	0.0073823
EARTH	2119-12-01 16:15	> 1 w	0.0781130	0.0774898	0.0015869
EARTH	2120-03-07 14:20	> 1 w	0.0909766	0.0908730	0.0004168
EARTH	2120-10-25 09:40	> 1 w	0.0930801	0.0901298	0.0027208
EARTH	2121-04-16 01:42	> 1 w	0.0776238	0.0742702	0.0028410
EARTH	2121-09-19 11:03	> 1 w	0.1071123	0.1058202	0.0015028
EARTH	2122-05-19 09:49	> 1 d	0.0586065	0.0582326	0.0012956
EARTH	2123-06-10 16:50	1405.0	0.0863751	0.0639908	0.0105206
EARTH	2124-06-12 11:41	123.1	0.1742607	0.1308697	0.0148848

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
218.22421788	139.78451746	0.05517388	MINIMUM
52.25777312	341.85957892	0.07678727	MINIMUM
125.08923574	53.71399277	0.09064940	SADDLE
318.38331216	241.23136780	0.11096738	SADDLE
346.47386329	91.69487943	1.90381297	SADDLE
170.35623624	275.59227866	2.07210744	MAXIMUM

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MOID Plots

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