Asteroids

2015XX169 help

Last update: 2026-07-30 14:25 UTC

Orbital Properties

Epoch

61200.0

MJD

Orbit type

Apollo

Perihelion (q)

0.819

Aphelion (Q)

1.190

Eccentricity (e)

0.185

Inclination (i)

7.6

deg

Orbit period (P)

367.7

Earth MOID

0.01418

U parameter

0.8

Next Earth close approach

Date

2029-04-18

Nominal distance (from Earth center)

0.19457

29106657

Maximum Brightness

30.8

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

27.4

mag

Diameter

9 - 19*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2015-12-09

Observatory

University of Arizona 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

61200.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.004542

1-sigma variation

1.068E-8

Unit

Eccentricity (e)

Value

0.185033

1-sigma variation

0.000001

Unit

Inclination (i)

Value

7.6018

1-sigma variation

3.152E-5

Unit

Long. of Ascending Node (Ω)

Value

256.1697

1-sigma variation

9.071E-6

Unit

Arg. of Perihelion (ω)

Value

282.2445

1-sigma variation

0.0001

Unit

Mean Anomaly (M)

Value

80.50961

1-sigma variation

0.00008

Unit

Perihelion distance

Value

0.818669

1-sigma variation

Unit

Aphelion distance

Value

1.190415

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.081215

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.024269

1-sigma variation

Unit

MOID

Value

0.014177

1-sigma variation

Unit

Orbit Period

Value

367.7480

1-sigma variation

Unit

U parameter

Value

0.8

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.14166E-16	-9.85180E-15	-2.28075E-13	-5.91633E-14	-8.22105E-13	-7.74056E-13
e	-9.85180E-15	1.73209E-12	6.88513E-12	9.71918E-12	1.19154E-10	1.04604E-10
i	-2.28075E-13	6.88513E-12	9.93665E-10	9.42645E-11	6.55660E-10	1.29057E-9
Ω	-5.91633E-14	9.71918E-12	9.42645E-11	8.22822E-11	6.34748E-10	6.14019E-10
ω	-8.22105E-13	1.19154E-10	6.55660E-10	6.34748E-10	8.79906E-9	7.41642E-9
M	-7.74056E-13	1.04604E-10	1.29057E-9	6.14019E-10	7.41642E-9	7.14989E-9

Date of computation: 2026-07-30 14:25 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

27.427

Unit

mag

Source

[1]

Slope Parameter (G)

Value

0.15**

Unit

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

[-]

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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

730

Unit

Source

[1]

Unobserved

Value

3177

Unit

Source

[1]

Normalized RMS of residuals

Value

0.407189

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2015-12-09.29469

Unit

Source

[2]

Last Observation

Value

2017-12-08.19777

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

57 (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

Filters

Initial Date: *

Final Date: *

Normalised Only accepted

Max residual (arcsec):

* - these fields are required

Plot

Computation parameters

As seen from:

Initial Date: *

Final Date: *

Output option:

One line per time step

Time step:*

* - these fields are required

Note: Ephemerides requests are limited to a maximum of 1000 points and a final date not exceeding 2040/12/31 00:00.

Close Approaches for 2015XX169 from 1950 to 2126

Body	Date in UTC	Time uncert. in min	Nominal distance in au	Min. possible distance in au	Distance uncert. in au
EARTH	1993-07-12 21:41	< 1 min	0.1625067	0.1624857	0.0000070
EARTH	1994-07-10 05:25	< 1 min	0.1217443	0.1217264	0.0000060
EARTH	1995-07-07 10:33	< 1 min	0.0881502	0.0881372	0.0000043
EARTH	1996-07-03 09:15	< 1 min	0.0665515	0.0665461	0.0000018
EARTH	1997-06-29 20:41	< 1 min	0.0619182	0.0619153	0.0000010
EARTH	1998-06-25 09:07	< 1 min	0.0730480	0.0730392	0.0000029
EARTH	1999-06-18 18:29	1.6	0.0938914	0.0938798	0.0000039
EARTH	2000-06-08 08:49	2.4	0.1186319	0.1186197	0.0000041
EARTH	2001-05-28 05:37	3.1	0.1430060	0.1429946	0.0000038
EARTH	2002-05-17 01:56	3.4	0.1643585	0.1643485	0.0000033
EARTH	2003-05-06 06:47	3.6	0.1822849	0.1822763	0.0000029
EARTH	2004-04-24 19:01	3.6	0.1966859	0.1966787	0.0000024
EARTH	2008-10-28 18:10	1.3	0.1965118	0.1965108	0.0000003
EARTH	2009-11-08 20:02	< 1 min	0.1772961	0.1772953	0.0000003
EARTH	2010-02-15 09:44	1.9	0.1975844	0.1975835	0.0000003
EARTH	2010-11-20 07:46	< 1 min	0.1530485	0.1530476	0.0000003
EARTH	2011-01-23 20:23	1.0	0.1764667	0.1764660	0.0000002
EARTH	2011-12-01 17:17	< 1 min	0.1236906	0.1236897	0.0000003
EARTH	2012-12-09 07:36	< 1 min	0.0912025	0.0912017	0.0000003
EARTH	2013-12-13 02:16	< 1 min	0.0598860	0.0598854	0.0000002
EARTH	2014-12-14 07:00	< 1 min	0.0350723	0.0350721	0.0000001
EARTH	2015-12-14 15:00	< 1 min	0.0216099	0.0216097	0.0000001
EARTH	2016-12-13 20:22	< 1 min	0.0191807	0.0191804	0.0000001
EARTH	2017-12-14 00:06	< 1 min	0.0249406	0.0249404	0.0000001
EARTH	2018-12-13 22:45	< 1 min	0.0434796	0.0434792	0.0000001
EARTH	2019-12-12 21:19	< 1 min	0.0715035	0.0715029	0.0000002
EARTH	2020-12-07 08:42	< 1 min	0.1041530	0.1041522	0.0000003
EARTH	2021-11-27 13:25	< 1 min	0.1365994	0.1365984	0.0000003
EARTH	2022-11-15 22:06	< 1 min	0.1653912	0.1653904	0.0000003
EARTH	2023-02-03 19:50	1.4	0.1825194	0.1825188	0.0000002
EARTH	2023-11-04 21:25	1.2	0.1889088	0.1889080	0.0000003
EARTH	2024-02-20 14:19	1.9	0.1991899	0.1991886	0.0000005
EARTH	2029-04-18 22:57	3.5	0.1945660	0.1945590	0.0000023
EARTH	2030-04-30 12:58	3.6	0.1800199	0.1800114	0.0000029
EARTH	2031-05-12 15:34	3.4	0.1610588	0.1610484	0.0000034
EARTH	2031-07-31 11:33	4.8	0.1988371	0.1988252	0.0000040
EARTH	2032-05-24 08:20	2.9	0.1378815	0.1378694	0.0000040
EARTH	2033-06-05 14:45	2.1	0.1114209	0.1114075	0.0000044
EARTH	2034-06-15 00:44	1.2	0.0841227	0.0841100	0.0000042
EARTH	2035-06-20 22:03	< 1 min	0.0612198	0.0612102	0.0000032
EARTH	2036-06-23 21:37	< 1 min	0.0494154	0.0494122	0.0000011
EARTH	2037-06-27 01:02	< 1 min	0.0543739	0.0543681	0.0000019
EARTH	2038-06-30 02:36	< 1 min	0.0779637	0.0779496	0.0000047
EARTH	2039-07-03 05:25	< 1 min	0.1140156	0.1139966	0.0000064
EARTH	2040-07-05 04:26	< 1 min	0.1565272	0.1565052	0.0000074

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
273.53774339	337.16895711	0.01417741	MINIMUM
84.79447433	169.18376014	0.04962975	MINIMUM
359.94236792	72.92268725	0.21187920	SADDLE
178.53239120	253.66533073	0.23382907	SADDLE
5.26347208	259.34767748	1.81884526	SADDLE
184.86633581	78.97237880	2.18208932	MAXIMUM

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MOID Plots

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