메타데이터
| 항목 |
값 |
| Designation |
C/2025 W1 (Sankovich) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2025-02-17T17:39:07.554240Z |
| Orbit solution date (soln_date, UTC) |
2025-12-18T15:12:26Z |
| Obs used |
80 |
| NEO |
- |
| M1 |
9.400 |
| K1 |
10.000 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2025-11-20T03:53:37.536000Z |
| Discovery magnitude (MPC) |
19.80 R |
| Discovery observatory (MPC) |
X19 · Santel Observatory, El Leoncito |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2025-11-26.0000000 |
| e |
0.99973624 |
| q (au) |
4.170169 |
| a (au) |
15810.455383 |
| i (deg) |
79.800605 |
| Ω (om, deg) |
95.890663 |
| ω (w, deg) |
250.634842 |
| M (ma, deg) |
0.000139 |
밝기
산란 + 전체 선형
$$
M_a = (9.394 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
9.394 |
| n |
6.000 |
| gf |
0.936 |
| gb |
-0.828 |
| k |
0.806 |
| δ90 |
4.562 |
| 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 |
06:30:21.13 |
-14:07:47.2 |
HIP 30952 |
16.24 |
| 2026-09-20 12:00 |
06:30:24.63 |
-14:08:29.8 |
HIP 30952 |
16.10 |
| 2026-09-21 00:00 |
06:30:27.97 |
-14:09:12.6 |
HIP 30952 |
16.01 |
| 2026-09-21 12:00 |
06:30:31.16 |
-14:09:55.5 |
HIP 30952 |
15.97 |
| 2026-09-22 00:00 |
06:30:34.19 |
-14:10:38.7 |
HIP 30952 |
15.97 |
| 2026-09-22 12:00 |
06:30:37.07 |
-14:11:21.9 |
HIP 30952 |
16.00 |
| 2026-09-23 00:00 |
06:30:39.78 |
-14:12:05.4 |
HIP 30952 |
16.06 |
| 2026-09-23 12:00 |
06:30:42.34 |
-14:12:48.9 |
HIP 30952 |
16.15 |
| 2026-09-24 00:00 |
06:30:44.74 |
-14:13:32.6 |
HIP 31055 |
16.21 |
| 2026-09-24 12:00 |
06:30:46.98 |
-14:14:16.4 |
HIP 31055 |
15.38 |
| 2026-09-25 00:00 |
06:30:49.07 |
-14:15:00.3 |
HIP 31055 |
14.57 |
| 2026-09-25 12:00 |
06:30:50.99 |
-14:15:44.3 |
HIP 31055 |
13.77 |
| 2026-09-26 00:00 |
06:30:52.75 |
-14:16:28.3 |
HIP 31055 |
12.98 |
| 2026-09-26 12:00 |
06:30:54.35 |
-14:17:12.4 |
HIP 31055 |
12.20 |
| 2026-09-27 00:00 |
06:30:55.79 |
-14:17:56.6 |
HIP 31055 |
11.44 |
| 2026-09-27 12:00 |
06:30:57.07 |
-14:18:40.8 |
HIP 31055 |
10.68 |
| 2026-09-28 00:00 |
06:30:58.18 |
-14:19:25.1 |
HIP 31055 |
9.93 |
| 2026-09-28 12:00 |
06:30:59.14 |
-14:20:09.4 |
HIP 31055 |
9.18 |
| 2026-09-29 00:00 |
06:30:59.93 |
-14:20:53.7 |
HIP 31055 |
8.44 |
| 2026-09-29 12:00 |
06:31:00.55 |
-14:21:37.9 |
HIP 31055 |
7.71 |
| 2026-09-30 00:00 |
06:31:01.02 |
-14:22:22.2 |
HIP 31055 |
6.97 |
| 2026-09-30 12:00 |
06:31:01.31 |
-14:23:06.5 |
HIP 31055 |
6.24 |
| 2026-10-01 00:00 |
06:31:01.45 |
-14:23:50.7 |
HIP 31055 |
5.51 |
| 2026-10-01 12:00 |
06:31:01.41 |
-14:24:34.9 |
HIP 31055 |
4.77 |
| 2026-10-02 00:00 |
06:31:01.22 |
-14:25:19.0 |
HIP 31055 |
4.04 |
| 2026-10-02 12:00 |
06:31:00.85 |
-14:26:03.0 |
HIP 31055 |
3.30 |
| 2026-10-03 00:00 |
06:31:00.32 |
-14:26:47.0 |
HIP 31055 |
2.56 |
| 2026-10-03 12:00 |
06:30:59.62 |
-14:27:30.8 |
HIP 31055 |
1.83 |
| 2026-10-04 00:00 |
06:30:58.75 |
-14:28:14.6 |
HIP 31055 |
1.13 |
| 2026-10-04 12:00 |
06:30:57.72 |
-14:28:58.2 |
HIP 31055 |
0.63 |
| 2026-10-05 00:00 |
06:30:56.52 |
-14:29:41.7 |
HIP 31055 |
0.88 |
| 2026-10-05 12:00 |
06:30:55.14 |
-14:30:25.0 |
HIP 31055 |
1.56 |
| 2026-10-06 00:00 |
06:30:53.60 |
-14:31:08.2 |
HIP 31055 |
2.34 |
| 2026-10-06 12:00 |
06:30:51.89 |
-14:31:51.1 |
HIP 31055 |
3.16 |
| 2026-10-07 00:00 |
06:30:50.01 |
-14:32:33.9 |
HIP 31055 |
4.01 |
| 2026-10-07 12:00 |
06:30:47.96 |
-14:33:16.5 |
HIP 31055 |
4.87 |
| 2026-10-08 00:00 |
06:30:45.73 |
-14:33:58.9 |
HIP 31055 |
5.76 |
| 2026-10-08 12:00 |
06:30:43.34 |
-14:34:41.0 |
HIP 31055 |
6.67 |
| 2026-10-09 00:00 |
06:30:40.77 |
-14:35:22.9 |
HIP 31055 |
7.60 |
| 2026-10-09 12:00 |
06:30:38.04 |
-14:36:04.5 |
HIP 31055 |
8.55 |
| 2026-10-10 00:00 |
06:30:35.13 |
-14:36:45.8 |
HIP 31055 |
9.53 |
| 2026-10-10 12:00 |
06:30:32.05 |
-14:37:26.8 |
HIP 31055 |
10.53 |
| 2026-10-11 00:00 |
06:30:28.79 |
-14:38:07.6 |
HIP 31055 |
11.56 |