메타데이터
| 항목 |
값 |
| Designation |
C/2025 N2 (ATLAS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2024-12-12T18:30:52.908480Z |
| Orbit solution date (soln_date, UTC) |
2026-07-06T12:12:27Z |
| Obs used |
49 |
| NEO |
- |
| M1 |
6.400 |
| K1 |
8.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2025-07-02T01:33:05.932800Z |
| Discovery magnitude (MPC) |
19.61 c |
| Discovery observatory (MPC) |
M22 · ATLAS South Africa, Sutherland |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2025-07-27.0000000 |
| e |
1.00220626 |
| q (au) |
8.984848 |
| a (au) |
-4072.429280 |
| i (deg) |
81.664420 |
| Ω (om, deg) |
94.462885 |
| ω (w, deg) |
230.115528 |
| M (ma, deg) |
0.000858 |
밝기
산란 + 전체 선형
$$
M_a = (-0.838 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
-0.838 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.502 |
| k |
1.000 |
| 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 |
05:18:09.92 |
-73:31:43.8 |
HIP 24507 |
12.21 |
| 2026-09-20 12:00 |
05:18:08.11 |
-73:33:26.0 |
HIP 24507 |
11.69 |
| 2026-09-21 00:00 |
05:18:05.92 |
-73:35:07.9 |
HIP 24507 |
11.38 |
| 2026-09-21 12:00 |
05:18:03.36 |
-73:36:49.6 |
HIP 24507 |
11.29 |
| 2026-09-22 00:00 |
05:18:00.43 |
-73:38:31.0 |
HIP 24507 |
11.43 |
| 2026-09-22 12:00 |
05:17:57.11 |
-73:40:12.0 |
HIP 24507 |
11.79 |
| 2026-09-23 00:00 |
05:17:53.43 |
-73:41:52.8 |
HIP 24507 |
12.35 |
| 2026-09-23 12:00 |
05:17:49.36 |
-73:43:33.3 |
HIP 24507 |
13.09 |
| 2026-09-24 00:00 |
05:17:44.92 |
-73:45:13.4 |
HIP 24507 |
13.97 |
| 2026-09-24 12:00 |
05:17:40.10 |
-73:46:53.2 |
HIP 24507 |
14.97 |
| 2026-09-25 00:00 |
05:17:34.90 |
-73:48:32.6 |
HIP 24739 |
15.51 |
| 2026-09-25 12:00 |
05:17:29.31 |
-73:50:11.6 |
HIP 24739 |
13.98 |
| 2026-09-26 00:00 |
05:17:23.35 |
-73:51:50.3 |
HIP 24739 |
12.51 |
| 2026-09-26 12:00 |
05:17:17.00 |
-73:53:28.5 |
HIP 24739 |
11.12 |
| 2026-09-27 00:00 |
05:17:10.26 |
-73:55:06.3 |
HIP 24739 |
9.85 |
| 2026-09-27 12:00 |
05:17:03.15 |
-73:56:43.7 |
HIP 24739 |
8.74 |
| 2026-09-28 00:00 |
05:16:55.64 |
-73:58:20.6 |
HIP 24739 |
7.87 |
| 2026-09-28 12:00 |
05:16:47.75 |
-73:59:57.1 |
HIP 24739 |
7.31 |
| 2026-09-29 00:00 |
05:16:39.47 |
-74:01:33.1 |
HIP 24739 |
7.16 |
| 2026-09-29 12:00 |
05:16:30.80 |
-74:03:08.6 |
HIP 24739 |
7.42 |
| 2026-09-30 00:00 |
05:16:21.75 |
-74:04:43.7 |
HIP 24739 |
8.07 |
| 2026-09-30 12:00 |
05:16:12.30 |
-74:06:18.1 |
HIP 24739 |
9.02 |
| 2026-10-01 00:00 |
05:16:02.46 |
-74:07:52.1 |
HIP 24739 |
10.19 |
| 2026-10-01 12:00 |
05:15:52.23 |
-74:09:25.5 |
HIP 24739 |
11.51 |
| 2026-10-02 00:00 |
05:15:41.61 |
-74:10:58.4 |
HIP 24739 |
12.93 |
| 2026-10-02 12:00 |
05:15:30.60 |
-74:12:30.6 |
HIP 24739 |
14.43 |
| 2026-10-03 00:00 |
05:15:19.19 |
-74:14:02.3 |
HIP 24739 |
15.99 |
| 2026-10-03 12:00 |
05:15:07.39 |
-74:15:33.3 |
HIP 24739 |
17.59 |
| 2026-10-04 00:00 |
05:14:55.19 |
-74:17:03.7 |
HIP 24739 |
19.22 |
| 2026-10-04 12:00 |
05:14:42.60 |
-74:18:33.5 |
HIP 24739 |
20.87 |
| 2026-10-05 00:00 |
05:14:29.61 |
-74:20:02.6 |
HIP 24739 |
22.54 |
| 2026-10-05 12:00 |
05:14:16.23 |
-74:21:31.1 |
HIP 24739 |
24.23 |
| 2026-10-06 00:00 |
05:14:02.45 |
-74:22:58.8 |
HIP 24737 |
25.34 |
| 2026-10-06 12:00 |
05:13:48.27 |
-74:24:25.8 |
HIP 24737 |
24.94 |
| 2026-10-07 00:00 |
05:13:33.70 |
-74:25:52.1 |
HIP 24737 |
24.67 |
| 2026-10-07 12:00 |
05:13:18.74 |
-74:27:17.6 |
HIP 24737 |
24.55 |
| 2026-10-08 00:00 |
05:13:03.38 |
-74:28:42.4 |
HIP 24737 |
24.58 |
| 2026-10-08 12:00 |
05:12:47.62 |
-74:30:06.3 |
HIP 24737 |
24.76 |
| 2026-10-09 00:00 |
05:12:31.47 |
-74:31:29.5 |
HIP 24737 |
25.09 |
| 2026-10-09 12:00 |
05:12:14.93 |
-74:32:51.8 |
HIP 24737 |
25.56 |
| 2026-10-10 00:00 |
05:11:57.99 |
-74:34:13.3 |
HIP 24737 |
26.16 |
| 2026-10-10 12:00 |
05:11:40.66 |
-74:35:34.0 |
HIP 24737 |
26.90 |
| 2026-10-11 00:00 |
05:11:22.94 |
-74:36:53.8 |
HIP 24737 |
27.75 |