Asteroids

2014LY21 help

Last update: 2025-04-01 07:30 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

7270724

Maximum Brightness

24.2

mag

Risk

Object is not in risk list

Object is not in priority list

Physical Properties

Absolute Magnitude (H)

28.9

mag

Diameter

4 - 10*

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

3.070590

Unit

Eccentricity (e)

Value

0.561916

1-sigma variation

4.151710

Unit

Inclination (i)

Value

9.4492

1-sigma variation

213.4350

Unit

Long. of Ascending Node (Ω)

Value

72.8108

1-sigma variation

1.8862

Unit

Arg. of Perihelion (ω)

Value

347.5715

1-sigma variation

563.0950

Unit

Mean Anomaly (M)

Value

211.39338

1-sigma variation

18927.70000

Unit

Perihelion distance

Value

0.293075

1-sigma variation

Unit

Aphelion distance

Value

1.044911

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

199.8623

1-sigma variation

Unit

U parameter

Value

9.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	9.42852E0	-1.27482E1	6.55319E2	5.76859E0	-1.72903E3	-5.81191E4
e	-1.27482E1	1.72367E1	-8.86062E2	-7.79871E0	2.33780E3	7.85821E4
i	6.55319E2	-8.86062E2	4.55543E4	4.00488E2	-1.20173E5	-4.03951E6
Ω	5.76859E0	-7.79871E0	4.00488E2	3.55789E0	-1.05796E3	-3.55583E4
ω	-1.72903E3	2.33780E3	-1.20173E5	-1.05796E3	3.17075E5	1.06581E7
M	-5.81191E4	7.85821E4	-4.03951E6	-3.55583E4	1.06581E7	3.58257E8

Date of computation: 2025-02-19 13:28 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

28.885

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 - 10*

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

3957

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 22:53	> 1 mo	0.0331074	0.0184935	14927.3330743
EARTH	1960-06-07 16:52	> 1 mo	0.0523174	0.0000000	15352.6386261
EARTH	1961-05-20 09:26	> 1 mo	0.0220291	0.0004310	2878.2109618
EARTH	1962-05-07 13:08	> 1 mo	0.0954417	0.0000000	15797.7252312
VENUS	1964-05-07 09:18	> 1 mo	0.0483111	0.0312234	8508.5515876
MERCURY	1967-05-20 14:25	> 1 mo	0.0448947	0.0402497	5221.0965590
MERCURY	1970-06-16 01:11	> 1 mo	0.0458583	0.0390895	1413.0236472
EARTH	1973-06-08 12:40	> 1 mo	0.1550664	0.0000000	1588.8804738
EARTH	1974-06-03 10:00	> 1 mo	0.0007686	0.0003257	1.2256567
EARTH	1975-05-12 08:52	> 1 mo	0.0108014	0.0056786	12.2497182
VENUS	1975-07-29 03:56	> 1 mo	0.0317989	0.0127122	32.3412179
EARTH	1976-05-08 00:32	> 1 mo	0.1796361	0.0119913	26.0065042
VENUS	1982-05-03 20:52	> 1 mo	0.0314049	0.0107353	10.6552081
EARTH	1986-06-08 05:14	> 1 mo	0.1915163	0.0253708	6.8004595
EARTH	1987-06-06 07:22	> 1 mo	0.0176017	0.0019460	7.1694281
VENUS	1987-09-22 22:42	> 1 mo	0.0306021	0.0231432	7.8101179
EARTH	1988-05-14 12:29	> 1 mo	0.0098247	0.0075895	2.5391850
EARTH	1989-05-07 18:43	> 1 mo	0.1427112	0.0000000	13.8632006
MERCURY	1993-11-13 00:02	> 1 mo	0.0497196	0.0441557	15.2918558
MERCURY	1996-12-10 02:48	> 1 mo	0.0451879	0.0331491	39.8218045
VENUS	1998-12-13 12:49	> 1 mo	0.0186059	0.0107990	33.6095287
EARTH	2000-06-08 21:31	> 1 mo	0.1122368	0.0004864	35.3644678
MERCURY	2000-08-17 15:10	> 1 mo	0.0335062	0.0322435	1.0158730
EARTH	2001-05-29 08:40	> 1 mo	0.0184851	0.0005921	11.0535295
EARTH	2002-05-09 05:30	> 1 mo	0.0415474	0.0060907	29.1391116
MERCURY	2003-09-14 02:54	> 1 mo	0.0419075	0.0360539	30.2659004
VENUS	2004-05-03 03:43	> 1 mo	0.0433617	0.0212097	39.4010456
MERCURY	2010-07-01 02:18	> 1 mo	0.0385832	0.0336445	12.1925054
VENUS	2011-02-06 14:24	> 1 mo	0.0420328	0.0210184	12.6745898
EARTH	2013-06-08 17:26	> 1 mo	0.1600332	0.0008208	3.9424780
MERCURY	2013-07-29 02:47	> 1 mo	0.0398947	0.0343800	3.0021591
EARTH	2014-06-03 17:38	> 1 d	0.0001339	0.0000511	0.0001317
EARTH	2020-06-02 13:20	> 1 mo	0.0052042	0.0000000	17.2891764
EARTH	2026-05-23 04:59	> 1 mo	0.0486051	0.0158018	75.7947622
EARTH	2032-05-10 22:45	> 1 mo	0.0685253	0.0241436	122.6470048
MERCURY	2034-05-03 24:00	> 1 mo	0.0290097	0.0000000	1230.7149754
EARTH	2037-06-07 15:47	> 1 mo	0.1562679	0.0000000	588.1045171
EARTH	2038-05-05 13:02	> 1 mo	0.1130907	0.0106095	420.7804280
MERCURY	2040-05-09 22:02	> 1 mo	0.0108571	0.0000000	857.1855388
VENUS	2040-10-14 01:03	> 1 mo	0.0481765	0.0000000	33.7973428
EARTH	2043-06-08 01:58	> 1 mo	0.0623193	0.0000000	708.3210183
EARTH	2044-05-04 21:56	> 1 mo	0.1939798	0.0079056	769.9645897
MERCURY	2046-05-16 06:54	> 1 mo	0.0136250	0.0021839	1376.4808393
EARTH	2049-06-02 09:06	> 1 mo	0.0088865	0.0000000	616.9715334
MERCURY	2052-05-25 18:32	> 1 mo	0.0168783	0.0000000	1383.4775941
EARTH	2055-05-15 22:16	> 1 mo	0.0610249	0.0368270	470.5170967
EARTH	2060-06-07 13:55	> 1 mo	0.1479460	0.0000000	4980.6792887
EARTH	2061-05-04 20:30	> 1 mo	0.1257026	0.0091272	4129.4660734
MERCURY	2062-03-27 06:24	> 1 mo	0.0264825	0.0000000	2733.1837092
EARTH	2066-06-05 02:51	> 1 mo	0.0120204	0.0000000	5929.1647710
MERCURY	2068-04-17 19:36	> 1 mo	0.0159244	0.0000000	5973.3181644
EARTH	2072-05-23 23:02	> 1 mo	0.0456266	0.0074233	3270.0311329
MERCURY	2074-04-27 03:51	> 1 mo	0.0350728	0.0000000	36069.6161714
EARTH	2078-05-10 09:34	> 1 mo	0.0712074	0.0201684	7765.2078253
EARTH	2083-06-08 17:44	> 1 mo	0.1253394	0.0000000	36393.4860391
EARTH	2084-05-04 16:43	> 1 mo	0.1382256	0.0070633	32154.7839400
EARTH	2089-06-05 17:40	> 1 mo	0.0209868	0.0000000	38891.6010781
EARTH	2095-05-28 14:32	> 1 mo	0.0344461	0.0000000	5534.5882375
EARTH	2101-05-15 19:15	> 1 mo	0.0607300	0.0327650	5334.9267173
EARTH	2106-06-08 20:25	> 1 mo	0.1778014	0.0000000	59733.0896792
EARTH	2107-05-07 17:55	> 1 mo	0.0994463	0.0098748	39852.7994623
EARTH	2112-06-08 20:11	> 1 mo	0.0732800	0.0000000	81009.9629758
EARTH	2113-05-06 07:52	> 1 mo	0.1839267	0.0055272	84753.6220462
EARTH	2118-06-04 05:56	> 1 mo	0.0062008	0.0000000	57868.6905492
EARTH	2124-05-14 18:23	> 1 mo	0.0620526	0.0304349	72757.5377402

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