Asteroids

2014LY21 help

Last update: 2025-03-29 00:36 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

7271102

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

4.238510

Unit

Eccentricity (e)

Value

0.561916

1-sigma variation

5.731070

Unit

Inclination (i)

Value

9.4492

1-sigma variation

294.6230

Unit

Long. of Ascending Node (Ω)

Value

72.8108

1-sigma variation

2.5952

Unit

Arg. of Perihelion (ω)

Value

347.5715

1-sigma variation

777.2440

Unit

Mean Anomaly (M)

Value

211.39222

1-sigma variation

26128.20000

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	1.79650E1	-2.42912E1	1.24871E3	1.09763E1	-3.29436E3	-1.10745E5
e	-2.42912E1	3.28451E1	-1.68845E3	-1.48406E1	4.45443E3	1.49742E5
i	1.24871E3	-1.68845E3	8.68026E4	7.62493E2	-2.28983E5	-7.69765E6
Ω	1.09763E1	-1.48406E1	7.62493E2	6.73491E0	-2.01291E3	-6.76631E4
ω	-3.29436E3	4.45443E3	-2.28983E5	-2.01291E3	6.04109E5	2.03080E7
M	-1.10745E5	1.49742E5	-7.69765E6	-6.76631E4	2.03080E7	6.82684E8

Date of computation: 2025-03-29 00:36 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

4003

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	0.0332665	0.0184959	11579.8133268
EARTH	1960-06-07 16:43	> 1 mo	0.0521544	0.0000000	11801.8457364
EARTH	1961-05-20 08:50	> 1 mo	0.0219984	0.0003962	2231.3302540
EARTH	1962-05-07 13:07	> 1 mo	0.0956095	0.0000000	12160.4149706
VENUS	1964-05-07 09:25	> 1 mo	0.0484020	0.0312234	6602.1032842
MERCURY	1967-05-20 15:12	> 1 mo	0.0448392	0.0401974	4005.2175209
MERCURY	1970-06-16 01:28	> 1 mo	0.0458434	0.0390917	1068.0401594
EARTH	1973-06-08 12:41	> 1 mo	0.1550495	0.0000000	1223.1582676
EARTH	1974-06-03 10:00	> 1 mo	0.0007686	0.0003257	0.9413928
EARTH	1975-05-12 08:52	> 1 mo	0.0108016	0.0056786	9.4299171
VENUS	1975-07-29 03:56	> 1 mo	0.0317993	0.0127124	24.8961561
EARTH	1976-05-08 00:32	> 1 mo	0.1796363	0.0119910	20.0194508
VENUS	1982-05-03 20:52	> 1 mo	0.0314048	0.0107346	8.2003740
EARTH	1986-06-08 05:14	> 1 mo	0.1915163	0.0253649	5.2371407
EARTH	1987-06-06 07:22	> 1 mo	0.0176018	0.0019458	5.5204982
VENUS	1987-09-22 22:42	> 1 mo	0.0306020	0.0231428	6.0140820
EARTH	1988-05-14 12:29	> 1 mo	0.0098247	0.0075891	1.9553181
EARTH	1989-05-07 18:43	> 1 mo	0.1427110	0.0000000	10.6737221
MERCURY	1993-11-13 00:02	> 1 mo	0.0497198	0.0441560	11.7718912
MERCURY	1996-12-10 02:48	> 1 mo	0.0451883	0.0331492	30.6549440
VENUS	1998-12-13 12:49	> 1 mo	0.0186055	0.0107990	25.8713867
EARTH	2000-06-08 21:31	> 1 mo	0.1122372	0.0004864	27.2228243
MERCURY	2000-08-17 15:10	> 1 mo	0.0335063	0.0322435	0.7835484
EARTH	2001-05-29 08:40	> 1 mo	0.0184850	0.0005921	8.5088565
EARTH	2002-05-09 05:30	> 1 mo	0.0415471	0.0060907	22.4306508
MERCURY	2003-09-14 02:54	> 1 mo	0.0419072	0.0360537	23.2980648
VENUS	2004-05-03 03:43	> 1 mo	0.0433613	0.0212097	30.3299792
MERCURY	2010-07-01 02:18	> 1 mo	0.0385833	0.0336445	9.3855851
VENUS	2011-02-06 14:24	> 1 mo	0.0420330	0.0210184	9.7566536
EARTH	2013-06-08 17:26	> 1 mo	0.1600332	0.0008208	3.0348389
MERCURY	2013-07-29 02:47	> 1 mo	0.0398947	0.0343800	2.3109995
EARTH	2014-06-03 17:38	> 1 d	0.0001339	0.0000513	0.0001051
EARTH	2020-06-02 13:20	> 1 mo	0.0052044	0.0000000	13.3090632
EARTH	2026-05-23 05:00	> 1 mo	0.0486043	0.0157994	58.3428931
EARTH	2032-05-10 22:45	> 1 mo	0.0685240	0.0241458	94.3966459
MERCURY	2034-05-03 23:59	> 1 mo	0.0289965	0.0000000	947.2357437
EARTH	2037-06-07 15:47	> 1 mo	0.1562742	0.0000000	452.6160015
EARTH	2038-05-05 13:03	> 1 mo	0.1130862	0.0106115	323.8191112
MERCURY	2040-05-09 22:01	> 1 mo	0.0108480	0.0000000	658.5912158
VENUS	2040-10-14 01:02	> 1 mo	0.0481761	0.0000000	25.8906586
EARTH	2043-06-08 01:58	> 1 mo	0.0623268	0.0000000	545.9611646
EARTH	2044-05-04 21:55	> 1 mo	0.1939716	0.0079063	593.5919404
MERCURY	2046-05-16 06:49	> 1 mo	0.0136397	0.0021966	1062.4573327
EARTH	2049-06-02 09:07	> 1 mo	0.0088799	0.0000000	476.2279395
MERCURY	2052-05-25 18:33	> 1 mo	0.0168930	0.0000000	1071.8509338
EARTH	2055-05-15 22:11	> 1 mo	0.0610300	0.0368181	363.8497974
EARTH	2060-06-07 13:56	> 1 mo	0.1478929	0.0000000	3850.1262720
EARTH	2061-05-04 20:29	> 1 mo	0.1257467	0.0091265	3193.0292492
MERCURY	2062-03-27 07:04	> 1 mo	0.0265116	0.0000000	2110.3958193
EARTH	2066-06-05 02:43	> 1 mo	0.0119573	0.0000000	4577.6002048
MERCURY	2068-04-17 19:44	> 1 mo	0.0159874	0.0000000	4529.0374125
EARTH	2072-05-23 23:22	> 1 mo	0.0455914	0.0073703	2571.7692549
MERCURY	2074-04-27 03:24	> 1 mo	0.0346856	0.0000000	28236.6916089
EARTH	2078-05-10 10:09	> 1 mo	0.0711244	0.0202290	6035.4101051
EARTH	2083-06-08 17:41	> 1 mo	0.1257281	0.0000000	28282.6004952
EARTH	2084-05-04 16:49	> 1 mo	0.1378826	0.0070795	24933.7656740
EARTH	2089-06-05 18:26	> 1 mo	0.0214019	0.0000000	30241.3099055
EARTH	2095-05-28 15:00	> 1 mo	0.0343838	0.0000000	4812.2241081
EARTH	2101-05-15 18:28	> 1 mo	0.0607845	0.0327187	3754.2536233
EARTH	2106-06-08 20:43	> 1 mo	0.1771808	0.0000000	43718.1594958
EARTH	2107-05-07 17:16	> 1 mo	0.0998619	0.0098043	29406.7149168
EARTH	2112-06-08 19:47	> 1 mo	0.0724332	0.0000000	60174.9214283
EARTH	2113-05-06 08:10	> 1 mo	0.1848143	0.0055236	63220.6095010
EARTH	2118-06-04 03:39	> 1 mo	0.0068131	0.0000000	44131.0286191
EARTH	2124-05-15 05:33	> 1 mo	0.0613347	0.0325207	47933.7110054

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
203.30290696	150.14927133	0.00020595	MINIMUM
355.50737711	312.27147936	0.69564738	SADDLE
356.00782820	133.22105533	1.30447206	SADDLE
179.36672464	317.38401619	2.03239391	MAXIMUM

Download:

MOID Plots

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