메타데이터
| 항목 |
값 |
| Designation |
C/2025 F1 (ATLAS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2025-04-20T11:22:51.692160Z |
| Orbit solution date (soln_date, UTC) |
2025-06-30T18:47:30Z |
| Obs used |
69 |
| NEO |
- |
| M1 |
15.800 |
| K1 |
44.750 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2025-03-22T00:57:23.299200Z |
| Discovery magnitude (MPC) |
19.16 c |
| Discovery observatory (MPC) |
W68 · ATLAS Chile, Rio Hurtado |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2025-04-03.0000000 |
| e |
0.99629808 |
| q (au) |
1.069969 |
| a (au) |
289.030892 |
| i (deg) |
109.235882 |
| Ω (om, deg) |
122.704828 |
| ω (w, deg) |
334.230510 |
| M (ma, deg) |
359.996495 |
밝기
산란 + 전체 선형
$$
M_a = (17.487 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
17.487 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-1.000 |
| k |
0.800 |
| δ90 |
10.000 |
| 파라미터 |
기호 |
범위 |
설명 |
| 태양·지구거리 1 AU에서의 절대등급 |
H0 |
-5 to 20 |
혜성의 고유 밝기 |
| 광도 기울기 파라미터 |
n |
2 to 6 |
태양거리 변화에 따른 밝기 변화율 |
| 전방 산란 비대칭 계수 |
gf |
0.8 to 1 |
전방 산란의 강도 |
| 후방 산란 비대칭 계수 |
gb |
-1 to -0.5 |
후방 산란의 강도 |
| 분할 계수 |
k |
0.8 to 1 |
전·후방 산란 기여도 비율 |
| 먼지/가스 밝기 비 |
δ90 |
1 to 10 |
코마에서 먼지 산란 대비 가스 방출의 상대 기여 |
참고: EPSC-DPS2025-160
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-09-20 00:00 |
20:07:07.42 |
+60:09:06.4 |
HIP 99108 |
8.40 |
| 2026-09-20 12:00 |
20:06:49.60 |
+60:03:22.9 |
HIP 99108 |
14.44 |
| 2026-09-21 00:00 |
20:06:32.20 |
+59:57:38.4 |
HIP 99108 |
20.54 |
| 2026-09-21 12:00 |
20:06:15.22 |
+59:51:53.2 |
HIP 99064 |
24.30 |
| 2026-09-22 00:00 |
20:05:58.64 |
+59:46:07.1 |
HIP 99064 |
19.12 |
| 2026-09-22 12:00 |
20:05:42.46 |
+59:40:20.2 |
HIP 99064 |
14.66 |
| 2026-09-23 00:00 |
20:05:26.70 |
+59:34:32.6 |
HIP 99064 |
11.77 |
| 2026-09-23 12:00 |
20:05:11.33 |
+59:28:44.2 |
HIP 99064 |
11.68 |
| 2026-09-24 00:00 |
20:04:56.36 |
+59:22:55.2 |
HIP 99064 |
14.43 |
| 2026-09-24 12:00 |
20:04:41.79 |
+59:17:05.5 |
HIP 99064 |
18.82 |
| 2026-09-25 00:00 |
20:04:27.62 |
+59:11:15.2 |
HIP 98737 |
16.76 |
| 2026-09-25 12:00 |
20:04:13.84 |
+59:05:24.3 |
HIP 98737 |
11.05 |
| 2026-09-26 00:00 |
20:04:00.44 |
+58:59:32.9 |
HIP 98737 |
6.20 |
| 2026-09-26 12:00 |
20:03:47.43 |
+58:53:41.0 |
HIP 98737 |
5.45 |
| 2026-09-27 00:00 |
20:03:34.81 |
+58:47:48.5 |
HIP 98846 |
6.74 |
| 2026-09-27 12:00 |
20:03:22.57 |
+58:41:55.6 |
HIP 98846 |
11.38 |
| 2026-09-28 00:00 |
20:03:10.70 |
+58:36:02.3 |
HIP 98846 |
16.95 |
| 2026-09-28 12:00 |
20:02:59.21 |
+58:30:08.6 |
HIP 98846 |
22.77 |
| 2026-09-29 00:00 |
20:02:48.10 |
+58:24:14.5 |
HIP 98846 |
28.69 |
| 2026-09-29 12:00 |
20:02:37.36 |
+58:18:20.0 |
HIP 98748 |
30.54 |
| 2026-09-30 00:00 |
20:02:26.98 |
+58:12:25.3 |
HIP 98748 |
25.19 |
| 2026-09-30 12:00 |
20:02:16.97 |
+58:06:30.2 |
HIP 98748 |
20.21 |
| 2026-10-01 00:00 |
20:02:07.33 |
+58:00:35.0 |
HIP 98748 |
15.98 |
| 2026-10-01 12:00 |
20:01:58.04 |
+57:54:39.5 |
HIP 98748 |
13.22 |
| 2026-10-02 00:00 |
20:01:49.12 |
+57:48:43.8 |
HIP 98611 |
9.63 |
| 2026-10-02 12:00 |
20:01:40.54 |
+57:42:47.9 |
HIP 98611 |
3.75 |
| 2026-10-03 00:00 |
20:01:32.33 |
+57:36:51.9 |
HIP 98611 |
2.86 |
| 2026-10-03 12:00 |
20:01:24.46 |
+57:30:55.8 |
HIP 98611 |
8.65 |
| 2026-10-04 00:00 |
20:01:16.94 |
+57:24:59.6 |
HIP 98611 |
14.63 |
| 2026-10-04 12:00 |
20:01:09.77 |
+57:19:03.4 |
HIP 98645 |
14.60 |
| 2026-10-05 00:00 |
20:01:02.95 |
+57:13:07.2 |
HIP 98645 |
11.15 |
| 2026-10-05 12:00 |
20:00:56.46 |
+57:07:10.9 |
HIP 98645 |
10.33 |
| 2026-10-06 00:00 |
20:00:50.31 |
+57:01:14.7 |
HIP 98645 |
12.66 |
| 2026-10-06 12:00 |
20:00:44.50 |
+56:55:18.6 |
HIP 98645 |
16.87 |
| 2026-10-07 00:00 |
20:00:39.02 |
+56:49:22.6 |
HIP 98645 |
21.90 |
| 2026-10-07 12:00 |
20:00:33.87 |
+56:43:26.7 |
HIP 98645 |
27.29 |
| 2026-10-08 00:00 |
20:00:29.06 |
+56:37:31.0 |
HIP 98254 |
32.10 |
| 2026-10-08 12:00 |
20:00:24.56 |
+56:31:35.4 |
HIP 98254 |
27.46 |
| 2026-10-09 00:00 |
20:00:20.40 |
+56:25:40.1 |
HIP 98254 |
23.47 |
| 2026-10-09 12:00 |
20:00:16.55 |
+56:19:45.0 |
HIP 98254 |
20.49 |
| 2026-10-10 00:00 |
20:00:13.02 |
+56:13:50.1 |
HIP 98254 |
19.00 |
| 2026-10-10 12:00 |
20:00:09.80 |
+56:07:55.6 |
HIP 98254 |
19.35 |
| 2026-10-11 00:00 |
20:00:06.90 |
+56:02:01.4 |
HIP 98271 |
18.88 |