Asteroids

2014LY21 help

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

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Aten

Perihelion (q)

0.293

Aphelion (Q)

1.045

Eccentricity (e)

0.562

Inclination (i)

9.4

deg

Orbit period (P)

199.9

Earth MOID

0.00076

U parameter

9.0

Next Earth close approach

Date

2026-05-23

Nominal distance (from Earth center)

0.0486

7271041

Maximum Brightness

24.4

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

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

0.668997

1-sigma variation

3.776020

Unit

Eccentricity (e)

Value

0.561908

1-sigma variation

5.122540

Unit

Inclination (i)

Value

9.4490

1-sigma variation

264.6550

Unit

Long. of Ascending Node (Ω)

Value

72.8101

1-sigma variation

2.8534

Unit

Arg. of Perihelion (ω)

Value

347.5727

1-sigma variation

694.5900

Unit

Mean Anomaly (M)

Value

211.64172

1-sigma variation

26510.80000

Unit

Perihelion distance

Value

0.293083

1-sigma variation

Unit

Aphelion distance

Value

1.044912

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.690011

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.001476

1-sigma variation

Unit

MOID

Value

0.000763

1-sigma variation

Unit

Orbit Period

Value

199.8642

1-sigma variation

Unit

U parameter

Value

9.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.42583E1	-1.93428E1	9.99291E2	1.07554E1	-2.62279E3	-1.00105E5
e	-1.93428E1	2.62404E1	-1.35565E3	-1.45898E1	3.55805E3	1.35803E5
i	9.99291E2	-1.35565E3	7.00420E4	7.53337E2	-1.83815E5	-7.01586E6
Ω	1.07554E1	-1.45898E1	7.53337E2	8.14160E0	-1.97853E3	-7.55116E4
ω	-2.62279E3	3.55805E3	-1.83815E5	-1.97853E3	4.82455E5	1.84141E7
M	-1.00105E5	1.35803E5	-7.01586E6	-7.55116E4	1.84141E7	7.02824E8

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

29.093

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

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

4140

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

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 2014LY21 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
VENUS	1958-12-17 23:01	> 1 mo	0.0333464	0.0184971	13554.9565769
EARTH	1960-06-07 16:38	> 1 mo	0.0520731	0.0000000	13753.3913670
EARTH	1961-05-20 08:32	> 1 mo	0.0219830	0.0003790	2611.2497914
EARTH	1962-05-07 13:07	> 1 mo	0.0956933	0.0000000	14180.8249839
VENUS	1964-05-07 09:29	> 1 mo	0.0484476	0.0312234	7729.5309237
MERCURY	1967-05-20 15:36	> 1 mo	0.0448116	0.0401473	4662.3537396
MERCURY	1970-06-16 01:37	> 1 mo	0.0458361	0.0390925	1234.0571551
EARTH	1973-06-08 12:41	> 1 mo	0.1550411	0.0000000	1426.4446226
EARTH	1974-06-03 10:00	> 1 mo	0.0007686	0.0003256	1.0965999
EARTH	1975-05-12 08:52	> 1 mo	0.0108016	0.0056786	10.9970289
VENUS	1975-07-29 03:56	> 1 mo	0.0317995	0.0127125	29.0333286
EARTH	1976-05-08 00:32	> 1 mo	0.1796365	0.0119908	23.3460735
VENUS	1982-05-03 20:52	> 1 mo	0.0314047	0.0107342	9.5619459
EARTH	1986-06-08 05:14	> 1 mo	0.1915164	0.0253619	6.1086933
EARTH	1987-06-06 07:22	> 1 mo	0.0176018	0.0019456	6.4387479
VENUS	1987-09-22 22:42	> 1 mo	0.0306019	0.0231426	7.0145793
EARTH	1988-05-14 12:29	> 1 mo	0.0098247	0.0075889	2.2806326
EARTH	1989-05-07 18:43	> 1 mo	0.1427110	0.0000000	12.4485418
MERCURY	1993-11-13 00:01	> 1 mo	0.0497198	0.0441561	13.7282705
MERCURY	1996-12-10 02:48	> 1 mo	0.0451885	0.0331492	35.7492462
VENUS	1998-12-13 12:49	> 1 mo	0.0186053	0.0107990	30.1699737
EARTH	2000-06-08 21:31	> 1 mo	0.1122374	0.0004864	31.7462734
MERCURY	2000-08-17 15:10	> 1 mo	0.0335063	0.0322435	0.9146482
EARTH	2001-05-29 08:40	> 1 mo	0.0184849	0.0005920	9.9227682
EARTH	2002-05-09 05:30	> 1 mo	0.0415469	0.0060907	26.1577998
MERCURY	2003-09-14 02:54	> 1 mo	0.0419070	0.0360536	27.1693698
VENUS	2004-05-03 03:43	> 1 mo	0.0433611	0.0212097	35.3696600
MERCURY	2010-07-01 02:18	> 1 mo	0.0385834	0.0336446	10.9451623
VENUS	2011-02-06 14:24	> 1 mo	0.0420330	0.0210184	11.3778706
EARTH	2013-06-08 17:26	> 1 mo	0.1600333	0.0008208	3.5391209
MERCURY	2013-07-29 02:47	> 1 mo	0.0398947	0.0343800	2.6950067
EARTH	2014-06-03 17:38	> 1 d	0.0001339	0.0000511	0.0001199
EARTH	2020-06-02 13:20	> 1 mo	0.0052045	0.0000000	15.5205284
EARTH	2026-05-23 05:00	> 1 mo	0.0486039	0.0157981	68.0353939
EARTH	2032-05-10 22:46	> 1 mo	0.0685234	0.0241466	110.0725719
MERCURY	2034-05-03 23:58	> 1 mo	0.0289900	0.0000000	1104.5386736
EARTH	2037-06-07 15:47	> 1 mo	0.1562773	0.0000000	527.7645977
EARTH	2038-05-05 13:03	> 1 mo	0.1130840	0.0106120	377.5709950
MERCURY	2040-05-09 22:00	> 1 mo	0.0108434	0.0000000	767.2892788
VENUS	2040-10-14 01:02	> 1 mo	0.0481760	0.0000000	30.1193773
EARTH	2043-06-08 01:58	> 1 mo	0.0623306	0.0000000	637.0881670
EARTH	2044-05-04 21:55	> 1 mo	0.1939675	0.0079061	692.7371882
MERCURY	2046-05-16 06:47	> 1 mo	0.0136470	0.0022029	1240.6596819
EARTH	2049-06-02 09:08	> 1 mo	0.0088766	0.0000000	556.1101763
MERCURY	2052-05-25 18:34	> 1 mo	0.0169005	0.0000000	1253.9652694
EARTH	2055-05-15 22:09	> 1 mo	0.0610325	0.0368135	425.2717954
EARTH	2060-06-07 13:56	> 1 mo	0.1478663	0.0000000	4499.2423649
EARTH	2061-05-04 20:28	> 1 mo	0.1257687	0.0091257	3731.8868356
MERCURY	2062-03-27 07:24	> 1 mo	0.0265262	0.0000000	2464.6424710
EARTH	2066-06-05 02:39	> 1 mo	0.0119257	0.0000000	5346.0270676
MERCURY	2068-04-17 19:48	> 1 mo	0.0160184	0.0000000	5240.2033596
EARTH	2072-05-23 23:33	> 1 mo	0.0455736	0.0073430	3031.3489574
MERCURY	2074-04-27 03:10	> 1 mo	0.0344901	0.0000000	33205.5705388
EARTH	2078-05-10 10:26	> 1 mo	0.0710827	0.0202569	7071.9554233
EARTH	2083-06-08 17:39	> 1 mo	0.1259233	0.0000000	33136.9762747
EARTH	2084-05-04 16:51	> 1 mo	0.1377106	0.0070876	29181.0301279
EARTH	2089-06-05 18:49	> 1 mo	0.0216105	0.0000000	35440.7569374
EARTH	2095-05-28 15:15	> 1 mo	0.0343500	0.0000000	5926.8870336
EARTH	2101-05-15 18:06	> 1 mo	0.0608099	0.0326999	4177.4608990
EARTH	2106-06-08 20:52	> 1 mo	0.1768828	0.0000000	49698.9557343
EARTH	2107-05-07 16:58	> 1 mo	0.1000626	0.0097748	33564.5987888
EARTH	2112-06-08 19:35	> 1 mo	0.0720221	0.0000000	68929.4951873
EARTH	2113-05-06 08:19	> 1 mo	0.1852465	0.0055220	72566.5497003
EARTH	2118-06-04 02:31	> 1 mo	0.0071159	0.0000000	51099.8421507
EARTH	2124-05-15 10:31	> 1 mo	0.0610183	0.0326691	51295.0905336

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
203.30287522	150.14927252	0.00020595	MINIMUM
355.50738201	312.27150744	0.69564753	SADDLE
356.00783080	133.22107950	1.30447191	SADDLE
179.36672440	317.38403715	2.03239383	MAXIMUM

Download:

MOID Plots

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