Astrophyzix Observatory PHA & NEO Asteroid News

Daily Asteroid Bulletin · NASA NeoWs catalogue · UTC

Near-Earth Object (NEO) and PHA Close-Approach Report: September 23, 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 23, 2026 (UTC), screening of the NASA NeoWs catalogue resolves 39 near-Earth object close approaches across the report window. The single closest encounter is 2018 SP2, passing at approximately 5.01 lunar distances (1,927,097 km) with a relative velocity near 14.3 km/s. No listed object is on an impacting trajectory.

CLOSEST CATALOGUED APPROACH IN OBSERVATION WINDOW

2018 SP2

5.01 LD

1,927,097 km · 0.012882 au · v_rel 14.26 km/s

EARTH SURFACE19.5 LD (FILTER EDGE)

Encounter (UTC)

2026-Sep-30 20:54

Est. diameter

0.044 km (NeoWs)

Diameter range

0.029 - 0.065 km

Earth radii

302 R(E)

Close Approaches On Report Date

Object	Epoch (UTC)	Dist (LD)	Dist (km)	v_rel	Diameter	Status
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

Lead Object Orbital Dossier

2018 SP2

Heliocentric osculating elements from NeoWs, epoch JD 2461000.5. Dynamical class: ATE (Near-Earth asteroid orbits similar to that of 2062 Aten).

Semi-major axis a

0.9246 au

Eccentricity e

0.2055

Inclination i

26.825 deg

Orbital period

0.889 yr

Asc. node OM

187.202 deg

Arg. perihelion w

303.398 deg

JPL Small-Body Database record: https://ssd.jpl.nasa.gov/tools/sbdb_lookup.html#/?sstr=3830890

7-Day Forward Outlook - Scroll Left/Right

Object	Epoch (UTC)	Dist (LD)	Dist (km)	v_rel	Diameter	Status
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	19,724,629	12.1	0.476	ROUTINE
2019 QY1	2026-Sep-26 02:49	192.77	74,134,163	20.0	0.279	PHA
2005 SP9	2026-Sep-26 09:37	147.43	56,699,115	16.5	0.189	ROUTINE
2001 SY169	2026-Sep-26 10:58	182.86	70,322,608	25.9	0.095	ROUTINE
2013 ET	2026-Sep-26 11:01	182.88	70,330,128	25.9	0.095	ROUTINE
2018 SD1	2026-Sep-26 14:58	93.16	35,828,310	22.8	0.048	ROUTINE
2015 HA10	2026-Sep-26 21:33	101.02	38,850,386	15.5	0.300	ROUTINE
2008 ST	2026-Sep-26 23:54	38.69	14,878,930	6.2	0.015	ROUTINE
2019 DJ1	2026-Sep-27 01:53	109.49	42,105,243	12.4	0.017	ROUTINE
2019 SH7	2026-Sep-27 05:50	84.37	32,446,693	9.6	0.087	ROUTINE
2014 TU	2026-Sep-27 10:19	105.70	40,650,768	15.6	0.038	ROUTINE
2017 GK4	2026-Sep-28 00:38	47.91	18,423,686	12.2	0.174	PHA
2016 FL12	2026-Sep-28 06:57	165.39	63,605,340	7.3	0.022	ROUTINE

Automated analysis · same clock as the feed

The window contains 39 catalogued Earth close-approaches (6 on the report date, 33 in the forward outlook). The nearest listed geometry is 2018 SP2 at 5.01 LD (non-PHA), relative velocity 14.3 km/s. 6 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

39

On report date

6

PHA in window

6

Inside 1 LD

0

Inside 5 LD

0

Median miss

102.36 LD

Fastest v_rel

30.5 km/s

Closest object

2018 SP2

DATA PROVENANCE AND TRANSPARENT SOURCE PIPELINE 

Module: Astrophyzix-NEO-Daily/2.2.0
Generated (UTC): 2026-09-23T00:00:04.706Z
Cache state: MISS
Analysis digest: 39 approaches (6 today / 33 outlook); closest 2018 SP2 @ 5.01 LD; PHA 6; sub-lunar 0; notable 0; median miss 102.36 LD; anomalies 0
Analysis generated (UTC): 2026-09-23T00:00:04.706Z
Source 1: NASA NeoWs feed
  endpoint: https://api.nasa.gov/neo/rest/v1/feed?start_date=2026-09-23&end_date=2026-09-30&api_key=***
  docs: https://api.nasa.gov/
  retrieved: 2026-09-23T00:00:04.994Z
Source 2: NASA NeoWs lookup
  endpoint: https://api.nasa.gov/neo/rest/v1/neo/3830890?api_key=***
  docs: https://api.nasa.gov/
  retrieved: 2026-09-23T00:00:06.627Z
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@838ms -> CACHE_LOOKUP@838ms -> FETCH_FEED@1126ms -> FETCH_ENRICH@2378ms -> PARSE@2760ms -> COMPUTE@2761ms -> VALIDATE@2761ms -> ANALYSE@2761ms -> RENDER@2762ms

Primary references: NASA NeoWs / api.nasa.gov (api.nasa.gov), NASA CNEOS (cneos.jpl.nasa.gov). Object hazard status should be verified against the CNEOS Sentry table.

Astrophyzix Observatory. (2026). Astrophyzix Risk Index - A Heuristic Scoring System for Near-Earth Object Close Approach Visualisation (Version 2.0). Zenodo. https://doi.org/10.5281/zenodo.22240223

Astrophyzix Observatory. (2026). Astrophyzix Digital Observatory Daily Close Approach Report: Methods, Provenance and Limitations Documentation (Version 1). Astrophyzix Digital Observatory. https://doi.org/10.5281/zenodo.22868834