Astrophyzix Observatory PHA & NEO Asteroid News

Daily Asteroid Bulletin · NASA NeoWs catalogue · UTC

Near-Earth Object Close-Approach Report: September 21, 2026

Catalogued Earth close-approaches across a 7-day window from the NASA NeoWs feed (JPL small-body solutions; cached at source). This bulletin is a catalogue report, not a live CNEOS CAD/Scout stream. Live Multi-watch CAD/Scout/Sentry tracker.

On September 21, 2026 (UTC), screening of the NASA NeoWs catalogue resolves 40 near-Earth object close approaches across the report window. The single closest encounter is 2010 JA, passing at approximately 26.22 lunar distances (10,081,613 km) with a relative velocity near 6.7 km/s. No listed object is on an impacting trajectory.

CLOSEST CATALOGUED APPROACH IN OBSERVATION WINDOW

2010 JA

26.22 LD

10,081,613 km · 0.067391 au · v_rel 6.68 km/s

EARTH SURFACE19.5 LD (FILTER EDGE)

Encounter (UTC)

2026-Sep-21 13:58

Est. diameter

0.016 km (NeoWs)

Diameter range

0.011 - 0.024 km

Earth radii

1,582 R(E)

Close Approaches On Report Date

Object	Epoch (UTC)	Dist (LD)	Dist (km)	v_rel	Diameter	Status
2010 JA	2026-Sep-21 13:58	26.22	10,081,613	6.7	0.016	ROUTINE
2015 BK509	2026-Sep-21 08:06	58.05	22,323,572	18.1	0.134	ROUTINE
2019 TZ5	2026-Sep-21 14:03	126.86	48,788,279	9.8	0.158	ROUTINE
2009 WQ6	2026-Sep-21 12:35	143.80	55,299,669	9.2	0.006	ROUTINE

Lead Object Orbital Dossier

2010 JA

Heliocentric osculating elements from NeoWs, epoch JD 2461000.5. Dynamical class: APO (Near-Earth asteroid orbits which cross the Earth’s orbit similar to that of 1862 Apollo).

Semi-major axis a

1.2157 au

Eccentricity e

0.2932

Inclination i

2.522 deg

Orbital period

1.340 yr

Asc. node OM

222.227 deg

Arg. perihelion w

75.023 deg

JPL Small-Body Database record: https://ssd.jpl.nasa.gov/tools/sbdb_lookup.html#/?sstr=3519453

7-Day Forward Outlook - Scroll Left/Right

Object	Epoch (UTC)	Dist (LD)	Dist (km)	v_rel	Diameter	Status
2018 PL23	2026-Sep-22 02:11	68.33	26,278,603	22.3	0.422	PHA
719194 (2018 PL23	2026-Sep-22 02:11	68.33	26,278,603	22.3	0.422	PHA
2019 RX	2026-Sep-22 03:28	68.90	26,495,838	6.5	0.054	ROUTINE
2017 RP15	2026-Sep-22 04:45	56.91	21,886,909	9.1	0.020	ROUTINE
2004 LA6	2026-Sep-22 08:19	141.72	54,500,983	9.3	0.173	ROUTINE
2018 RL6	2026-Sep-22 15:07	163.66	62,938,834	17.9	0.079	ROUTINE
2012 VB37	2026-Sep-23 04:08	26.80	10,304,606	6.3	0.032	ROUTINE
2016 SE	2026-Sep-23 05:10	73.14	28,128,969	8.9	0.027	ROUTINE
2015 KT120	2026-Sep-23 10:12	123.10	47,340,691	13.1	0.038	ROUTINE
2013 ES11	2026-Sep-23 14:51	134.55	51,742,444	20.4	0.072	ROUTINE
2004 FH	2026-Sep-23 17:58	155.18	59,678,378	13.0	0.021	ROUTINE
2008 CO116	2026-Sep-23 19:23	189.67	72,943,128	21.9	0.239	ROUTINE
2015 SY16	2026-Sep-24 04:31	192.03	73,848,077	30.5	0.192	PHA
2006 TL	2026-Sep-24 08:32	106.00	40,765,882	9.8	0.066	ROUTINE
2019 VW2	2026-Sep-24 12:39	115.78	44,525,498	14.4	0.115	ROUTINE
2011 TB4	2026-Sep-24 21:17	114.75	44,130,095	21.9	0.033	ROUTINE
2016 LY8	2026-Sep-25 12:12	34.17	13,142,327	7.3	0.098	ROUTINE
2018 HN	2026-Sep-25 14:23	43.20	16,612,224	11.8	0.040	ROUTINE
2018 KS	2026-Sep-25 16:03	88.88	34,180,550	6.9	0.010	ROUTINE
376848 (2001 RY47	2026-Sep-26 00:32	51.29	19,724,643	12.1	0.476	ROUTINE

Automated analysis · same clock as the feed

The window contains 40 catalogued Earth close-approaches (4 on the report date, 36 in the forward outlook). The nearest listed geometry is 2010 JA at 26.22 LD (non-PHA), relative velocity 6.7 km/s. 7 objects in the window are flagged potentially hazardous (size and MOID criteria, not this week's miss distance). No listed object is on an impacting trajectory in this catalogue.

Approaches in window

On report date

PHA in window

Inside 1 LD

Inside 5 LD

Median miss

101.69 LD

Fastest v_rel

30.5 km/s

Closest object

2010 JA

Methodology

Data Provenance

Module: Astrophyzix-NEO-Daily/2.2.0
Generated (UTC): 2026-09-21T13:08:23.067Z
Cache state: HIT (age 38 min)
Analysis digest: 40 approaches (4 today / 36 outlook); closest 2010 JA @ 26.22 LD; PHA 7; sub-lunar 0; notable 0; median miss 101.69 LD; anomalies 0
Analysis generated (UTC): 2026-09-21T13:08:23.067Z
Source 1: NASA NeoWs feed
  endpoint: https://api.nasa.gov/neo/rest/v1/feed?start_date=2026-09-21&end_date=2026-09-28&api_key=***
  docs: https://api.nasa.gov/
  retrieved: 2026-09-21T12:30:36.088Z
Source 2: NASA NeoWs lookup
  endpoint: https://api.nasa.gov/neo/rest/v1/neo/3519453?api_key=***
  docs: https://api.nasa.gov/
  retrieved: 2026-09-21T12:30:37.466Z
Constants:
  - AU = 149597870.7 km (IAU 2012 Resolution B2)
  - Lunar distance = 384400 km (JPL/IAU nominal mean)
  - Earth mean radius = 6371 km (IUGG)
  - TT - UTC = 69.184 s (37 leap seconds + 32.184 s), valid 2026
  - Diameter self-test: D[km] = 1329 / sqrt(pv) * 10^(-H/5), pv 0.25-0.05 (Bowell)
Source note: For live CNEOS Scout and JPL Close Approach Data use the Dual-watch PHA and NEO Tracking System: https://www.astrophyzix.org/p/cneo-observatory.html
Pipeline trace: INIT@1275ms -> CACHE_LOOKUP@1275ms -> PARSE@1497ms -> COMPUTE@1498ms -> VALIDATE@1498ms -> ANALYSE@1499ms -> RENDER@1500ms