메타데이터
| 항목 |
값 |
| Designation |
C/2025 A3 (Tsuchinshan) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2026-03-15T00:12:02.952000Z |
| Orbit solution date (soln_date, UTC) |
2026-09-15T13:42:26Z |
| Obs used |
111 |
| NEO |
- |
| M1 |
7.100 |
| K1 |
12.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2025-01-05T19:43:38.208000Z |
| Discovery magnitude (MPC) |
19.60 R |
| Discovery observatory (MPC) |
D29 · Purple Mountain Observatory, XuYi Station |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2025-05-26.0000000 |
| e |
0.43168572 |
| q (au) |
5.792427 |
| a (au) |
10.192296 |
| i (deg) |
9.977179 |
| Ω (om, deg) |
322.433905 |
| ω (w, deg) |
222.302512 |
| M (ma, deg) |
351.124842 |
밝기
산란 + 전체 선형
$$
M_a = (4.258 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
4.258 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-1.000 |
| 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
찾아보기
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-09-20 00:00 |
12:50:26.44 |
-13:20:12.0 |
HIP 62747 |
17.04 |
| 2026-09-20 12:00 |
12:50:49.99 |
-13:22:40.6 |
HIP 62747 |
10.93 |
| 2026-09-21 00:00 |
12:51:13.57 |
-13:25:09.5 |
HIP 62747 |
5.14 |
| 2026-09-21 12:00 |
12:51:37.18 |
-13:27:38.7 |
HIP 62747 |
3.38 |
| 2026-09-22 00:00 |
12:52:00.81 |
-13:30:08.1 |
HIP 62747 |
8.65 |
| 2026-09-22 12:00 |
12:52:24.47 |
-13:32:37.7 |
HIP 62747 |
14.72 |
| 2026-09-23 00:00 |
12:52:48.16 |
-13:35:07.7 |
HIP 62921 |
13.54 |
| 2026-09-23 12:00 |
12:53:11.87 |
-13:37:37.8 |
HIP 62921 |
7.37 |
| 2026-09-24 00:00 |
12:53:35.61 |
-13:40:08.3 |
HIP 62921 |
2.09 |
| 2026-09-24 12:00 |
12:53:59.37 |
-13:42:38.9 |
HIP 62921 |
5.80 |
| 2026-09-25 00:00 |
12:54:23.15 |
-13:45:09.9 |
HIP 62921 |
11.92 |
| 2026-09-25 12:00 |
12:54:46.96 |
-13:47:41.0 |
HIP 62973 |
14.10 |
| 2026-09-26 00:00 |
12:55:10.79 |
-13:50:12.4 |
HIP 62973 |
16.58 |
| 2026-09-26 12:00 |
12:55:34.65 |
-13:52:44.0 |
HIP 62973 |
20.75 |
| 2026-09-27 00:00 |
12:55:58.52 |
-13:55:15.9 |
HIP 62973 |
25.82 |
| 2026-09-27 12:00 |
12:56:22.42 |
-13:57:47.9 |
HIP 62973 |
31.34 |
| 2026-09-28 00:00 |
12:56:46.34 |
-14:00:20.2 |
HIP 63257 |
30.84 |
| 2026-09-28 12:00 |
12:57:10.27 |
-14:02:52.7 |
HIP 63257 |
26.25 |
| 2026-09-29 00:00 |
12:57:34.23 |
-14:05:25.5 |
HIP 63257 |
22.52 |
| 2026-09-29 12:00 |
12:57:58.21 |
-14:07:58.4 |
HIP 63257 |
20.13 |
| 2026-09-30 00:00 |
12:58:22.21 |
-14:10:31.6 |
HIP 63257 |
19.59 |
| 2026-09-30 12:00 |
12:58:46.23 |
-14:13:04.9 |
HIP 63436 |
17.11 |
| 2026-10-01 00:00 |
12:59:10.26 |
-14:15:38.5 |
HIP 63436 |
11.99 |
| 2026-10-01 12:00 |
12:59:34.32 |
-14:18:12.3 |
HIP 63436 |
8.70 |
| 2026-10-02 00:00 |
12:59:58.39 |
-14:20:46.2 |
HIP 63436 |
9.43 |
| 2026-10-02 12:00 |
13:00:22.48 |
-14:23:20.4 |
HIP 63436 |
13.54 |
| 2026-10-03 00:00 |
13:00:46.58 |
-14:25:54.8 |
HIP 63436 |
18.95 |
| 2026-10-03 12:00 |
13:01:10.70 |
-14:28:29.3 |
HIP 63436 |
24.84 |
| 2026-10-04 00:00 |
13:01:34.84 |
-14:31:04.0 |
HIP 63665 |
19.58 |
| 2026-10-04 12:00 |
13:01:58.99 |
-14:33:38.9 |
HIP 63665 |
13.38 |
| 2026-10-05 00:00 |
13:02:23.16 |
-14:36:14.0 |
HIP 63665 |
7.51 |
| 2026-10-05 12:00 |
13:02:47.34 |
-14:38:49.2 |
HIP 63665 |
3.94 |
| 2026-10-06 00:00 |
13:03:11.53 |
-14:41:24.7 |
HIP 63665 |
7.52 |
| 2026-10-06 12:00 |
13:03:35.74 |
-14:44:00.3 |
HIP 63665 |
13.40 |
| 2026-10-07 00:00 |
13:03:59.95 |
-14:46:36.0 |
HIP 63665 |
19.61 |
| 2026-10-07 12:00 |
13:04:24.18 |
-14:49:11.9 |
HIP 63665 |
25.92 |
| 2026-10-08 00:00 |
13:04:48.43 |
-14:51:48.0 |
HIP 63960 |
24.03 |
| 2026-10-08 12:00 |
13:05:12.68 |
-14:54:24.2 |
HIP 63960 |
17.97 |
| 2026-10-09 00:00 |
13:05:36.94 |
-14:57:00.5 |
HIP 63960 |
12.27 |
| 2026-10-09 12:00 |
13:06:01.21 |
-14:59:37.0 |
HIP 63960 |
7.78 |
| 2026-10-10 00:00 |
13:06:25.49 |
-15:02:13.7 |
HIP 63960 |
7.27 |
| 2026-10-10 12:00 |
13:06:49.78 |
-15:04:50.4 |
HIP 63960 |
11.30 |
| 2026-10-11 00:00 |
13:07:14.07 |
-15:07:27.3 |
HIP 63960 |
16.89 |