Asteroids

2015YA help

Last update: 2024-04-27 12:42 UTC

Orbital Properties

Epoch

60400.0

MJD

Orbit type

Aten

Perihelion (q)

0.717

Aphelion (Q)

1.274

Eccentricity (e)

0.280

Inclination (i)

1.6

deg

Orbit period (P)

362.7

Earth MOID

0.00350

U parameter

5.1

Next Earth close approach

Date

2038-04-20

Nominal distance (from Earth center)

0.18067

27027619

Maximum Brightness

25.6

mag

Risk

Object is not in risk list

Object is not in priority list

Physical Properties

Absolute Magnitude (H)

27.4

mag

Diameter

9 - 19*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2015-12-16

Observatory

Catalina Sky Survey

Orbit Visualiser

Click the button to start Orbit Visualiser

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

60400.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

0.995243

1-sigma variation

0.000003

Unit

Eccentricity (e)

Value

0.279652

1-sigma variation

0.000210

Unit

Inclination (i)

Value

1.6184

1-sigma variation

0.0008

Unit

Long. of Ascending Node (Ω)

Value

254.8985

1-sigma variation

0.0032

Unit

Arg. of Perihelion (ω)

Value

83.5037

1-sigma variation

0.0160

Unit

Mean Anomaly (M)

Value

195.87462

1-sigma variation

0.08637

Unit

Perihelion distance

Value

0.716921

1-sigma variation

Unit

Aphelion distance

Value

1.273565

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.126127

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.036341

1-sigma variation

Unit

MOID

Value

0.003503

1-sigma variation

Unit

Orbit Period

Value

362.6536

1-sigma variation

Unit

U parameter

Value

5.1

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.09415E-11	6.93676E-10	2.60749E-9	1.04958E-8	-5.29056E-8	-2.85697E-7
e	6.93676E-10	4.39918E-8	1.65300E-7	6.64719E-7	-3.35435E-6	-1.81129E-5
i	2.60749E-9	1.65300E-7	6.25435E-7	2.53274E-6	-1.26376E-5	-6.80943E-5
Ω	1.04958E-8	6.64719E-7	2.53274E-6	1.03459E-5	-5.09717E-5	-2.74128E-4
ω	-5.29056E-8	-3.35435E-6	-1.26376E-5	-5.09717E-5	2.56041E-4	1.38151E-3
M	-2.85697E-7	-1.81129E-5	-6.80943E-5	-2.74128E-4	1.38151E-3	7.45992E-3

Date of computation: 2024-04-23 10:08 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

27.447

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

9 - 19*

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 ODIM	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

Unit

Source

[1]

Unobserved

Value

3050

Unit

Source

[1]

Normalized RMS of residuals

Value

0.666689

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2015-12-16.33347

Unit

Source

[2]

Last Observation

Value

2015-12-21.28348

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

50 (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

[3]

Last Observation

Value

Unit

Source

[3]

Delay (Discarded)

Value

0 (0)

Unit

Source

[1]

Doppler (Discarded)

Value

0 (0)

Unit

Source

[1]

Total Radar Observations (Discarded)

Value

0 (0)

Unit

Source

[1]

Note: The ASCII file is in a format suitable for Orbfit input.

Sources

No.	Name	Additional
[1]	ESA ODIM	ESA orbit determination and impact monitoring system
[2]	MPC	Minor Planet Center: https://www.minorplanetcenter.net
[3]	JPL Radar Observations	Jet Propulsion Laboratory: https://ssd.jpl.nasa.gov/dat/radar_data_ast.txt

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 2015YA from 1950 to 2124

Body	Date in UTC	Time uncert. in min	Nominal distance in au	Min. possibile distance in au	Distance uncert. in au
EARTH	1987-05-08 04:57	819.8	0.1939854	0.1442822	0.0165828
EARTH	1988-05-09 18:12	732.8	0.1389118	0.0959504	0.0143526
EARTH	1989-05-12 01:18	589.5	0.0877558	0.0535293	0.0115007
EARTH	1990-05-14 03:07	387.1	0.0411069	0.0196031	0.0077525
EARTH	1991-05-15 17:16	90.1	0.0134264	0.0134246	0.0000079
EARTH	1992-05-16 00:29	107.7	0.0375231	0.0259480	0.0039912
EARTH	1993-05-16 22:16	39.4	0.0786549	0.0647981	0.0046328
EARTH	1994-05-14 16:51	748.9	0.1241415	0.1098918	0.0047525
EARTH	1995-05-02 05:18	> 1 d	0.1678568	0.1557642	0.0040311
EARTH	1995-06-08 23:08	> 1 d	0.1748665	0.1616591	0.0044064
EARTH	2010-11-11 06:56	446.5	0.1854483	0.1846216	0.0002756
EARTH	2011-01-02 00:48	295.1	0.1767472	0.1758321	0.0003050
EARTH	2011-12-20 22:17	83.0	0.1375688	0.1370614	0.0001691
EARTH	2012-12-13 14:46	2.0	0.0931874	0.0929591	0.0000761
EARTH	2013-12-13 12:50	7.1	0.0510279	0.0500189	0.0003364
EARTH	2014-12-14 14:02	21.8	0.0158934	0.0142965	0.0005338
EARTH	2015-12-15 04:48	< 1 min	0.0038529	0.0038440	0.0000030
EARTH	2016-12-13 20:09	18.6	0.0239121	0.0221542	0.0005865
EARTH	2017-12-13 15:24	1.9	0.0597383	0.0572537	0.0008283
EARTH	2018-12-15 00:46	102.5	0.1006000	0.0976808	0.0009731
EARTH	2019-12-22 07:40	389.6	0.1379294	0.1350819	0.0009492
EARTH	2020-11-13 17:22	967.2	0.1835937	0.1809990	0.0008650
EARTH	2020-12-31 17:16	622.2	0.1711334	0.1687272	0.0008021
EARTH	2022-01-09 20:29	715.5	0.1987434	0.1967943	0.0006497
EARTH	2038-04-20 22:12	1242.9	0.1806685	0.1751416	0.0018423
EARTH	2038-06-13 23:58	> 1 d	0.1926653	0.1868712	0.0019320
EARTH	2039-04-30 23:06	960.9	0.1506996	0.1440195	0.0022268
EARTH	2040-05-08 14:36	367.2	0.1157307	0.1083476	0.0024616
EARTH	2041-05-11 03:55	69.9	0.0807257	0.0734945	0.0024127
EARTH	2042-05-11 07:40	20.8	0.0491254	0.0426520	0.0021676
EARTH	2043-05-10 23:12	36.1	0.0246635	0.0202313	0.0015296
EARTH	2044-05-09 18:46	6.5	0.0135655	0.0126351	0.0003637
EARTH	2045-05-09 23:27	5.2	0.0122144	0.0118116	0.0001950
EARTH	2046-05-10 06:20	71.9	0.0126770	0.0117861	0.0008237
EARTH	2047-05-10 18:22	309.8	0.0175473	0.0117944	0.0057407
EARTH	2048-05-10 12:52	430.4	0.0361703	0.0118426	0.0122789
EARTH	2049-05-11 08:47	225.9	0.0647713	0.0206297	0.0153404
EARTH	2050-05-11 10:25	685.1	0.0984349	0.0483016	0.0168404
EARTH	2051-05-07 05:46	> 1 d	0.1344882	0.0835881	0.0169992
EARTH	2052-04-25 19:11	> 1 d	0.1683704	0.1239889	0.0148013
EARTH	2052-06-02 11:09	> 1 w	0.1759012	0.1267881	0.0164288
EARTH	2053-04-16 04:16	> 1 d	0.1979267	0.1617091	0.0120764
EARTH	2071-01-03 11:02	137.2	0.1968857	0.1964010	0.0001696
EARTH	2071-11-09 02:13	941.8	0.1811755	0.1774275	0.0012495
EARTH	2071-12-26 18:33	916.0	0.1723096	0.1691494	0.0010600
EARTH	2072-12-16 21:02	1241.6	0.1440545	0.1358193	0.0027509
EARTH	2073-12-10 04:17	726.1	0.1132950	0.0995724	0.0045825
EARTH	2074-12-08 16:28	271.6	0.0834795	0.0652177	0.0061057
EARTH	2075-12-08 23:39	16.1	0.0549403	0.0336700	0.0071541
EARTH	2076-12-08 14:18	119.3	0.0319362	0.0113277	0.0072882
EARTH	2077-12-09 04:08	67.6	0.0197827	0.0075651	0.0049121
EARTH	2078-12-09 06:10	154.2	0.0252872	0.0221117	0.0010633
EARTH	2079-12-09 02:12	259.8	0.0437019	0.0240716	0.0065493
EARTH	2080-12-08 06:13	4.6	0.0694217	0.0368903	0.0108476
EARTH	2081-12-09 10:38	1082.3	0.0990677	0.0564366	0.0142108
EARTH	2082-12-14 15:34	> 1 d	0.1306640	0.0821159	0.0161854
EARTH	2083-12-23 01:10	> 1 d	0.1586829	0.1112024	0.0158402
EARTH	2084-11-01 17:57	> 1 w	0.1956073	0.1512741	0.0148182
EARTH	2084-12-30 08:04	> 1 w	0.1833678	0.1396583	0.0145904
EARTH	2104-04-18 13:56	> 1 d	0.1753411	0.1409595	0.0114665
EARTH	2104-06-06 03:00	> 1 w	0.1863801	0.1490789	0.0124734
EARTH	2105-04-28 21:37	> 1 d	0.1452923	0.1101477	0.0117279
EARTH	2106-05-06 02:58	1230.9	0.1118241	0.0812377	0.0102241
EARTH	2107-05-08 03:10	58.4	0.0791794	0.0570799	0.0074114
EARTH	2108-05-07 03:40	147.4	0.0499924	0.0380426	0.0040351
EARTH	2109-05-06 23:33	77.3	0.0292245	0.0284741	0.0002512
EARTH	2110-05-06 21:39	82.5	0.0189734	0.0134216	0.0026616
EARTH	2111-05-07 02:03	255.7	0.0181253	0.0131928	0.0053754
EARTH	2112-05-06 14:19	457.0	0.0256438	0.0131949	0.0112287
EARTH	2113-05-07 08:30	425.8	0.0439381	0.0132054	0.0147330
EARTH	2114-05-07 23:43	82.7	0.0699952	0.0256256	0.0153089
EARTH	2115-05-08 00:29	695.8	0.1005057	0.0571246	0.0145530
EARTH	2116-05-03 10:00	> 1 d	0.1331102	0.0946435	0.0128403
EARTH	2117-04-23 12:60	> 1 d	0.1653032	0.1362432	0.0096886
EARTH	2118-04-14 06:43	> 1 d	0.1932248	0.1729747	0.0067504

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