Asteroids

2014LY21 help

Last update: 2025-07-29 02:36 UTC

Orbital Properties

Epoch

60800.0

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

0.00021

U parameter

9.0

Next Earth close approach

Date

2026-05-23

Nominal distance (from Earth center)

0.0486

7271089

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

60800.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

0.668993

1-sigma variation

3.232230

Unit

Eccentricity (e)

Value

0.561916

1-sigma variation

4.370370

Unit

Inclination (i)

Value

9.4492

1-sigma variation

224.6700

Unit

Long. of Ascending Node (Ω)

Value

72.8108

1-sigma variation

1.9834

Unit

Arg. of Perihelion (ω)

Value

347.5715

1-sigma variation

592.7250

Unit

Mean Anomaly (M)

Value

211.39253

1-sigma variation

19924.80000

Unit

Perihelion distance

Value

0.293075

1-sigma variation

Unit

Aphelion distance

Value

1.044912

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.690127

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.000403

1-sigma variation

Unit

MOID

Value

0.000206

1-sigma variation

Unit

Orbit Period

Value

199.8624

1-sigma variation

Unit

U parameter

Value

9.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.04473E1	-1.41261E1	7.26135E2	6.38769E0	-1.91582E3	-6.44016E4
e	-1.41261E1	1.91002E1	-9.81837E2	-8.63601E0	2.59042E3	8.70787E4
i	7.26135E2	-9.81837E2	5.04766E4	4.43521E2	-1.33156E5	-4.47619E6
Ω	6.38769E0	-8.63601E0	4.43521E2	3.93408E0	-1.17147E3	-3.93760E4
ω	-1.91582E3	2.59042E3	-1.33156E5	-1.17147E3	3.51322E5	1.18099E7
M	-6.44016E4	8.70787E4	-4.47619E6	-3.93760E4	1.18099E7	3.96997E8

Date of computation: 2025-07-29 02:36 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

29.091

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

4094

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 22:59	> 1 mo	0.0332842	0.0184962	11482.0291864
EARTH	1960-06-07 16:42	> 1 mo	0.0521364	0.0000000	11690.5841107
EARTH	1961-05-20 08:46	> 1 mo	0.0219950	0.0003923	2212.3540212
EARTH	1962-05-07 13:07	> 1 mo	0.0956281	0.0000000	12047.5726837
VENUS	1964-05-07 09:26	> 1 mo	0.0484120	0.0312234	6546.5819608
MERCURY	1967-05-20 15:17	> 1 mo	0.0448331	0.0401772	3966.5006898
MERCURY	1970-06-16 01:30	> 1 mo	0.0458418	0.0390914	1055.9786057
EARTH	1973-06-08 12:41	> 1 mo	0.1550476	0.0000000	1211.8194776
EARTH	1974-06-03 10:00	> 1 mo	0.0007686	0.0003257	0.9324308
EARTH	1975-05-12 08:52	> 1 mo	0.0108016	0.0056786	9.3424782
VENUS	1975-07-29 03:56	> 1 mo	0.0317993	0.0127124	24.6652685
EARTH	1976-05-08 00:32	> 1 mo	0.1796364	0.0119910	19.8337617
VENUS	1982-05-03 20:52	> 1 mo	0.0314048	0.0107345	8.1241096
EARTH	1986-06-08 05:14	> 1 mo	0.1915163	0.0253642	5.1888069
EARTH	1987-06-06 07:22	> 1 mo	0.0176018	0.0019457	5.4694635
VENUS	1987-09-22 22:42	> 1 mo	0.0306020	0.0231428	5.9585128
EARTH	1988-05-14 12:29	> 1 mo	0.0098247	0.0075890	1.9372567
EARTH	1989-05-07 18:43	> 1 mo	0.1427110	0.0000000	10.5749378
MERCURY	1993-11-13 00:01	> 1 mo	0.0497198	0.0441560	11.6627485
MERCURY	1996-12-10 02:48	> 1 mo	0.0451883	0.0331492	30.3706776
VENUS	1998-12-13 12:49	> 1 mo	0.0186055	0.0107990	25.6313332
EARTH	2000-06-08 21:31	> 1 mo	0.1122372	0.0004864	26.9702902
MERCURY	2000-08-17 15:10	> 1 mo	0.0335063	0.0322435	0.7764493
EARTH	2001-05-29 08:40	> 1 mo	0.0184850	0.0005921	8.4299325
EARTH	2002-05-09 05:30	> 1 mo	0.0415471	0.0060907	22.2225691
MERCURY	2003-09-14 02:54	> 1 mo	0.0419071	0.0360537	23.0819417
VENUS	2004-05-03 03:43	> 1 mo	0.0433613	0.0212097	30.0486104
MERCURY	2010-07-01 02:18	> 1 mo	0.0385833	0.0336445	9.2985263
VENUS	2011-02-06 14:24	> 1 mo	0.0420330	0.0210184	9.6661487
EARTH	2013-06-08 17:26	> 1 mo	0.1600332	0.0008208	3.0066864
MERCURY	2013-07-29 02:47	> 1 mo	0.0398947	0.0343800	2.2895629
EARTH	2014-06-03 17:38	> 1 d	0.0001339	0.0000513	0.0001043
EARTH	2020-06-02 13:20	> 1 mo	0.0052044	0.0000000	13.1856519
EARTH	2026-05-23 05:00	> 1 mo	0.0486042	0.0157992	57.8015366
EARTH	2032-05-10 22:45	> 1 mo	0.0685239	0.0241461	93.5195828
MERCURY	2034-05-03 23:58	> 1 mo	0.0289951	0.0000000	938.4350373
EARTH	2037-06-07 15:47	> 1 mo	0.1562749	0.0000000	448.4080083
EARTH	2038-05-05 13:03	> 1 mo	0.1130857	0.0106119	320.8061738
MERCURY	2040-05-09 22:00	> 1 mo	0.0108470	0.0000000	652.3468276
VENUS	2040-10-14 01:02	> 1 mo	0.0481761	0.0000000	25.6368428
EARTH	2043-06-08 01:58	> 1 mo	0.0623277	0.0000000	540.9750449
EARTH	2044-05-04 21:55	> 1 mo	0.1939707	0.0079066	588.1835299
MERCURY	2046-05-16 06:49	> 1 mo	0.0136413	0.0021979	1052.9161534
EARTH	2049-06-02 09:07	> 1 mo	0.0088792	0.0000000	471.9523930
MERCURY	2052-05-25 18:33	> 1 mo	0.0168947	0.0000000	1062.6614179
EARTH	2055-05-15 22:10	> 1 mo	0.0610305	0.0368171	360.6559794
EARTH	2060-06-07 13:56	> 1 mo	0.1478870	0.0000000	3816.1754912
EARTH	2061-05-04 20:28	> 1 mo	0.1257515	0.0091266	3164.9704443
MERCURY	2062-03-27 07:08	> 1 mo	0.0265148	0.0000000	2091.5029866
EARTH	2066-06-05 02:42	> 1 mo	0.0119504	0.0000000	4536.6118320
MERCURY	2068-04-17 19:45	> 1 mo	0.0159942	0.0000000	4479.3578491
EARTH	2072-05-23 23:25	> 1 mo	0.0455875	0.0073645	2553.9265235
MERCURY	2074-04-27 03:21	> 1 mo	0.0346427	0.0000000	28026.5037093
EARTH	2078-05-10 10:13	> 1 mo	0.0711152	0.0202348	5985.7442099
EARTH	2083-06-08 17:41	> 1 mo	0.1257710	0.0000000	28049.3460877
EARTH	2084-05-04 16:49	> 1 mo	0.1378448	0.0070815	24722.1220553
EARTH	2089-06-05 18:31	> 1 mo	0.0214477	0.0000000	29993.6202406
EARTH	2095-05-28 15:03	> 1 mo	0.0343765	0.0000000	4826.8029197
EARTH	2101-05-15 18:23	> 1 mo	0.0607902	0.0327178	3681.7132502
EARTH	2106-06-08 20:45	> 1 mo	0.1771145	0.0000000	43071.1614489
EARTH	2107-05-07 17:12	> 1 mo	0.0999065	0.0098026	28997.2750171
EARTH	2112-06-08 19:44	> 1 mo	0.0723421	0.0000000	59383.6916348
EARTH	2113-05-06 08:12	> 1 mo	0.1849100	0.0055246	62417.7560402
EARTH	2118-06-04 03:24	> 1 mo	0.0068800	0.0000000	43660.1844300
EARTH	2124-05-15 06:40	> 1 mo	0.0612627	0.0324324	46616.4533645

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