Asteroids

2014LY21 help

Last update: 2025-06-12 09:51 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

7271084

Maximum Brightness

24.4

mag

Risk

Object is not in risk list

Object is not in priority 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

3.085610

Unit

Eccentricity (e)

Value

0.561916

1-sigma variation

4.172120

Unit

Inclination (i)

Value

9.4492

1-sigma variation

214.4780

Unit

Long. of Ascending Node (Ω)

Value

72.8108

1-sigma variation

1.8943

Unit

Arg. of Perihelion (ω)

Value

347.5715

1-sigma variation

565.8380

Unit

Mean Anomaly (M)

Value

211.39254

1-sigma variation

19020.90000

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	9.52100E0	-1.28735E1	6.61746E2	5.82169E0	-1.74595E3	-5.86912E4
e	-1.28735E1	1.74066E1	-8.94774E2	-7.87070E0	2.36074E3	7.93576E4
i	6.61746E2	-8.94774E2	4.60010E4	4.04179E2	-1.21349E5	-4.07927E6
Ω	5.82169E0	-7.87070E0	4.04179E2	3.58824E0	-1.06768E3	-3.58869E4
ω	-1.74595E3	2.36074E3	-1.21349E5	-1.06768E3	3.20172E5	1.07628E7
M	-5.86912E4	7.93576E4	-4.07927E6	-3.58869E4	1.07628E7	3.61796E8

Date of computation: 2025-06-12 09:51 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

4049

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	0.0332904	0.0184963	10964.3899934
EARTH	1960-06-07 16:41	> 1 mo	0.0521301	0.0000000	11159.6813539
EARTH	1961-05-20 08:45	> 1 mo	0.0219938	0.0003910	2112.5717155
EARTH	1962-05-07 13:07	> 1 mo	0.0956345	0.0000000	11501.0584487
VENUS	1964-05-07 09:26	> 1 mo	0.0484156	0.0312234	6251.5239854
MERCURY	1967-05-20 15:19	> 1 mo	0.0448309	0.0401705	3786.0485436
MERCURY	1970-06-16 01:31	> 1 mo	0.0458412	0.0390922	1007.3588344
EARTH	1973-06-08 12:41	> 1 mo	0.1550470	0.0000000	1156.8515093
EARTH	1974-06-03 10:00	> 1 mo	0.0007686	0.0003257	0.8900575
EARTH	1975-05-12 08:52	> 1 mo	0.0108016	0.0056786	8.9186971
VENUS	1975-07-29 03:56	> 1 mo	0.0317993	0.0127124	23.5464232
EARTH	1976-05-08 00:32	> 1 mo	0.1796364	0.0119909	18.9340693
VENUS	1982-05-03 20:52	> 1 mo	0.0314048	0.0107345	7.7555184
EARTH	1986-06-08 05:14	> 1 mo	0.1915163	0.0253640	4.9535164
EARTH	1987-06-06 07:22	> 1 mo	0.0176018	0.0019457	5.2214173
VENUS	1987-09-22 22:42	> 1 mo	0.0306020	0.0231428	5.6882965
EARTH	1988-05-14 12:29	> 1 mo	0.0098247	0.0075890	1.8494048
EARTH	1989-05-07 18:43	> 1 mo	0.1427110	0.0000000	10.0953154
MERCURY	1993-11-13 00:01	> 1 mo	0.0497198	0.0441560	11.1337227
MERCURY	1996-12-10 02:48	> 1 mo	0.0451883	0.0331492	28.9930378
VENUS	1998-12-13 12:49	> 1 mo	0.0186055	0.0107990	24.4686256
EARTH	2000-06-08 21:31	> 1 mo	0.1122372	0.0004864	25.7468642
MERCURY	2000-08-17 15:10	> 1 mo	0.0335063	0.0322435	0.7412847
EARTH	2001-05-29 08:40	> 1 mo	0.0184850	0.0005921	8.0475370
EARTH	2002-05-09 05:30	> 1 mo	0.0415470	0.0060907	21.2145082
MERCURY	2003-09-14 02:54	> 1 mo	0.0419071	0.0360537	22.0348989
VENUS	2004-05-03 03:43	> 1 mo	0.0433613	0.0212097	28.6855409
MERCURY	2010-07-01 02:18	> 1 mo	0.0385833	0.0336445	8.8767281
VENUS	2011-02-06 14:24	> 1 mo	0.0420330	0.0210184	9.2276735
EARTH	2013-06-08 17:26	> 1 mo	0.1600332	0.0008208	2.8702972
MERCURY	2013-07-29 02:47	> 1 mo	0.0398947	0.0343800	2.1857035
EARTH	2014-06-03 17:38	> 1 d	0.0001339	0.0000513	0.0001004
EARTH	2020-06-02 13:20	> 1 mo	0.0052044	0.0000000	12.5875561
EARTH	2026-05-23 05:00	> 1 mo	0.0486042	0.0157991	55.1795583
EARTH	2032-05-10 22:45	> 1 mo	0.0685238	0.0241464	89.2769711
MERCURY	2034-05-03 23:58	> 1 mo	0.0289946	0.0000000	895.8621137
EARTH	2037-06-07 15:47	> 1 mo	0.1562751	0.0000000	428.0646216
EARTH	2038-05-05 13:03	> 1 mo	0.1130856	0.0106122	306.2510317
MERCURY	2040-05-09 22:00	> 1 mo	0.0108466	0.0000000	622.7097350
VENUS	2040-10-14 01:02	> 1 mo	0.0481761	0.0000000	24.4692738
EARTH	2043-06-08 01:58	> 1 mo	0.0623280	0.0000000	516.4627174
EARTH	2044-05-04 21:55	> 1 mo	0.1939704	0.0079069	561.5364545
MERCURY	2046-05-16 06:49	> 1 mo	0.0136419	0.0021984	1005.2623327
EARTH	2049-06-02 09:07	> 1 mo	0.0088789	0.0000000	450.5927490
MERCURY	2052-05-25 18:33	> 1 mo	0.0168953	0.0000000	1014.7153908
EARTH	2055-05-15 22:10	> 1 mo	0.0610307	0.0368169	344.3582343
EARTH	2060-06-07 13:56	> 1 mo	0.1478849	0.0000000	3643.6729774
EARTH	2061-05-04 20:28	> 1 mo	0.1257533	0.0091268	3021.9383994
MERCURY	2062-03-27 07:10	> 1 mo	0.0265160	0.0000000	1996.8641729
EARTH	2066-06-05 02:42	> 1 mo	0.0119479	0.0000000	4331.3297972
MERCURY	2068-04-17 19:45	> 1 mo	0.0159967	0.0000000	4273.5457985
EARTH	2072-05-23 23:25	> 1 mo	0.0455861	0.0073624	2440.1336330
MERCURY	2074-04-27 03:20	> 1 mo	0.0346273	0.0000000	26772.8729020
EARTH	2078-05-10 10:14	> 1 mo	0.0711119	0.0202377	5716.3744694
EARTH	2083-06-08 17:41	> 1 mo	0.1257863	0.0000000	26786.8674669
EARTH	2084-05-04 16:49	> 1 mo	0.1378312	0.0070824	23607.3464358
EARTH	2089-06-05 18:33	> 1 mo	0.0214641	0.0000000	28644.1968827
EARTH	2095-05-28 15:05	> 1 mo	0.0343739	0.0000000	4628.0048426
EARTH	2101-05-15 18:21	> 1 mo	0.0607922	0.0327153	3501.8612318
EARTH	2106-06-08 20:46	> 1 mo	0.1770909	0.0000000	41035.1584384
EARTH	2107-05-07 17:11	> 1 mo	0.0999223	0.0097973	27635.3198103
EARTH	2112-06-08 19:43	> 1 mo	0.0723096	0.0000000	56610.5642715
EARTH	2113-05-06 08:13	> 1 mo	0.1849442	0.0055238	59512.6110282
EARTH	2118-06-04 03:18	> 1 mo	0.0069038	0.0000000	41658.0255235
EARTH	2124-05-15 07:04	> 1 mo	0.0612373	0.0325801	44205.5970283

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
203.30289283	150.14927186	0.00020595	MINIMUM
355.50737929	312.27149186	0.69564745	SADDLE
356.00782936	133.22106609	1.30447199	SADDLE
179.36672453	317.38402552	2.03239387	MAXIMUM

Download:

MOID Plots

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