Asteroids

2014LY21 help

Last update: 2026-07-30 11:21 UTC

Orbital Properties

Epoch

61200.0

MJD

Orbit type

Aten

Perihelion (q)

0.293

Aphelion (Q)

1.045

Eccentricity (e)

0.562

Inclination (i)

9.5

deg

Orbit period (P)

199.8

Earth MOID

0.00015

U parameter

9.0

Next Earth close approach

Date

2032-05-10

Nominal distance (from Earth center)

0.06852

10250982

Maximum Brightness

26.1

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

29.1

mag

Diameter

4 - 9*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2014-06-02

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

0.668957

1-sigma variation

2.250490

Unit

Eccentricity (e)

Value

0.561834

1-sigma variation

3.252550

Unit

Inclination (i)

Value

9.4669

1-sigma variation

159.1950

Unit

Long. of Ascending Node (Ω)

Value

72.7652

1-sigma variation

69.5765

Unit

Arg. of Perihelion (ω)

Value

347.6062

1-sigma variation

337.1090

Unit

Mean Anomaly (M)

Value

211.97568

1-sigma variation

19444.90000

Unit

Perihelion distance

Value

0.293115

1-sigma variation

Unit

Aphelion distance

Value

1.044800

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.690323

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.000297

1-sigma variation

Unit

MOID

Value

0.000152

1-sigma variation

Unit

Orbit Period

Value

199.8462

1-sigma variation

Unit

U parameter

Value

9.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	5.06468E0	-7.31982E0	3.58216E2	-1.56581E2	-7.58658E2	-4.37605E4
e	-7.31982E0	1.05791E1	-5.17732E2	2.26301E2	1.09646E3	6.32456E4
i	3.58216E2	-5.17732E2	2.53430E4	-1.10751E4	-5.36569E4	-3.09510E6
Ω	-1.56581E2	2.26301E2	-1.10751E4	4.84089E3	2.34547E4	1.35291E6
ω	-7.58658E2	1.09646E3	-5.36569E4	2.34547E4	1.13643E5	6.55504E6
M	-4.37605E4	6.32456E4	-3.09510E6	1.35291E6	6.55504E6	3.78105E8

Date of computation: 2026-07-30 11:21 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

29.093

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

4 - 9*

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

4.506E-2

Unit

Source

[1]

Unobserved

Value

4446

Unit

Source

[1]

Normalized RMS of residuals

Value

0.537186

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2014-06-02.41612

Unit

Source

[2]

Last Observation

Value

2014-06-02.46118

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

11 (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

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 2014LY21 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
VENUS	1958-12-17 23:00	> 1 mo	0.0333206	0.0184967	8899.2407211
EARTH	1960-06-07 16:40	> 1 mo	0.0520994	0.0000000	9042.4735112
EARTH	1961-05-20 08:38	> 1 mo	0.0219880	0.0003845	1714.4999964
EARTH	1962-05-07 13:07	> 1 mo	0.0956663	0.0000000	9321.4676159
VENUS	1964-05-07 09:28	> 1 mo	0.0484328	0.0312234	5074.3760628
MERCURY	1967-05-20 15:28	> 1 mo	0.0448205	0.0401664	3066.4800731
MERCURY	1970-06-16 01:34	> 1 mo	0.0458385	0.0390925	813.6081559
EARTH	1973-06-08 12:41	> 1 mo	0.1550438	0.0000000	937.6305417
EARTH	1974-06-03 10:00	> 1 mo	0.0007686	0.0003256	0.7210824
EARTH	1975-05-12 08:52	> 1 mo	0.0108016	0.0056786	7.2285922
VENUS	1975-07-29 03:56	> 1 mo	0.0317994	0.0127125	19.0842968
EARTH	1976-05-08 00:32	> 1 mo	0.1796364	0.0119909	15.3459609
VENUS	1982-05-03 20:52	> 1 mo	0.0314047	0.0107343	6.2855360
EARTH	1986-06-08 05:14	> 1 mo	0.1915163	0.0253629	4.0151240
EARTH	1987-06-06 07:22	> 1 mo	0.0176018	0.0019457	4.2321588
VENUS	1987-09-22 22:42	> 1 mo	0.0306020	0.0231427	4.6106178
EARTH	1988-05-14 12:29	> 1 mo	0.0098247	0.0075890	1.4990324
EARTH	1989-05-07 18:43	> 1 mo	0.1427110	0.0000000	8.1824920
MERCURY	1993-11-13 00:01	> 1 mo	0.0497198	0.0441561	9.0238844
MERCURY	1996-12-10 02:48	> 1 mo	0.0451884	0.0331492	23.4987971
VENUS	1998-12-13 12:49	> 1 mo	0.0186054	0.0107990	19.8315779
EARTH	2000-06-08 21:31	> 1 mo	0.1122373	0.0004864	20.8676575
MERCURY	2000-08-17 15:10	> 1 mo	0.0335063	0.0322435	0.6010309
EARTH	2001-05-29 08:40	> 1 mo	0.0184850	0.0005921	6.5224856
EARTH	2002-05-09 05:30	> 1 mo	0.0415470	0.0060907	17.1942102
MERCURY	2003-09-14 02:54	> 1 mo	0.0419071	0.0360536	17.8591360
VENUS	2004-05-03 03:43	> 1 mo	0.0433612	0.0212097	23.2494172
MERCURY	2010-07-01 02:18	> 1 mo	0.0385833	0.0336446	7.1945343
VENUS	2011-02-06 14:24	> 1 mo	0.0420330	0.0210184	7.4789690
EARTH	2013-06-08 17:26	> 1 w	0.1600333	0.0008209	2.3263565
MERCURY	2013-07-29 02:47	> 1 mo	0.0398947	0.0343800	1.7714976
EARTH	2014-06-03 17:38	1247.8	0.0001339	0.0000515	0.0000852
EARTH	2020-06-02 13:20	> 1 mo	0.0052044	0.0000000	10.2023096
EARTH	2026-05-23 05:00	> 1 mo	0.0486040	0.0157988	44.7229639
EARTH	2032-05-10 22:46	> 1 mo	0.0685236	0.0241471	72.3573081
MERCURY	2034-05-03 23:58	> 1 mo	0.0289921	0.0000000	726.0801313
EARTH	2037-06-07 15:47	> 1 mo	0.1562763	0.0000000	346.9349493
EARTH	2038-05-05 13:03	> 1 mo	0.1130847	0.0106132	248.2051579
MERCURY	2040-05-09 22:00	> 1 mo	0.0108449	0.0000000	504.5289259
VENUS	2040-10-14 01:02	> 1 mo	0.0481760	0.0000000	19.8143033
EARTH	2043-06-08 01:58	> 1 mo	0.0623294	0.0000000	418.6980712
EARTH	2044-05-04 21:55	> 1 mo	0.1939688	0.0079078	455.2562848
MERCURY	2046-05-16 06:48	> 1 mo	0.0136446	0.0022009	815.1838839
EARTH	2049-06-02 09:08	> 1 mo	0.0088777	0.0000000	365.3946543
MERCURY	2052-05-25 18:34	> 1 mo	0.0168980	0.0000000	823.4278543
EARTH	2055-05-15 22:09	> 1 mo	0.0610317	0.0368154	279.3435448
EARTH	2060-06-07 13:56	> 1 mo	0.1478749	0.0000000	2955.5433241
EARTH	2061-05-04 20:28	> 1 mo	0.1257616	0.0091273	2451.3568939
MERCURY	2062-03-27 07:17	> 1 mo	0.0265215	0.0000000	1619.3588372
EARTH	2066-06-05 02:40	> 1 mo	0.0119360	0.0000000	3512.5080486
MERCURY	2068-04-17 19:47	> 1 mo	0.0160084	0.0000000	3453.4985974
EARTH	2072-05-23 23:29	> 1 mo	0.0455794	0.0073523	1985.7295878
MERCURY	2074-04-27 03:14	> 1 mo	0.0345537	0.0000000	21768.1898992
EARTH	2078-05-10 10:21	> 1 mo	0.0710962	0.0202491	4641.5076177
EARTH	2083-06-08 17:40	> 1 mo	0.1258599	0.0000000	21749.3244366
EARTH	2084-05-04 16:50	> 1 mo	0.1377665	0.0070862	19159.7548980
EARTH	2089-06-05 18:42	> 1 mo	0.0215427	0.0000000	23259.5672942
EARTH	2095-05-28 15:10	> 1 mo	0.0343612	0.0000000	3829.0532904
EARTH	2101-05-15 18:13	> 1 mo	0.0608018	0.0327077	2788.6098824
EARTH	2106-06-08 20:49	> 1 mo	0.1769787	0.0000000	32941.4838592
EARTH	2107-05-07 17:04	> 1 mo	0.0999980	0.0097878	22218.2859500
EARTH	2112-06-08 19:39	> 1 mo	0.0721547	0.0000000	45576.5150813
EARTH	2113-05-06 08:16	> 1 mo	0.1851070	0.0055245	47950.1323870
EARTH	2118-06-04 02:53	> 1 mo	0.0070178	0.0000000	33676.6971443
EARTH	2124-05-15 08:57	> 1 mo	0.0611180	0.0325673	34690.0118821
MERCURY	2126-05-01 14:03	> 1 mo	0.0180736	0.0005728	374534.9025255

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
203.21323972	147.87951729	0.00015206	MINIMUM
355.28279348	309.81268854	0.69605397	SADDLE
355.79044554	130.77753454	1.30446365	SADDLE
179.31184952	315.13650509	2.03266750	MAXIMUM

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MOID Plots

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