메타데이터
| 항목 |
값 |
| Designation |
461P/WISE |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2021-10-05T00:29:50.389440Z |
| Orbit solution date (soln_date, UTC) |
2024-04-13T16:43:14Z |
| Obs used |
756 |
| NEO |
- |
| M1 |
17.400 |
| K1 |
14.750 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2010-07-28T09:12:17.856000Z |
| Discovery magnitude (MPC) |
20.40 C |
| Discovery observatory (MPC) |
H36 · Sandlot Observatory, Scranton |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2020-04-09.0000000 |
| e |
0.57036034 |
| q (au) |
1.348581 |
| a (au) |
3.138866 |
| i (deg) |
18.412131 |
| Ω (om, deg) |
194.400261 |
| ω (w, deg) |
174.777098 |
| M (ma, deg) |
263.581492 |
밝기
산란 + 전체 선형
$$
M_a = (18.224 + 4.041\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
18.224 |
| n |
4.041 |
| gf |
0.881 |
| gb |
-0.772 |
| k |
0.976 |
| δ90 |
1.000 |
| 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
잔차 (구간 선형)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 시작일 (UTC) |
끝 (UTC) |
a |
b |
| 2021-06-06 |
2021-10-04 |
+0.8293 |
+0.008 |
| 2021-10-05 |
2022-01-28 |
-2.0272 |
+0.197 |
log10 r = log10(태양거리/AU), Δ = 지구거리(AU)
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-07-29 00:00 |
15:28:13.76 |
-00:12:24.2 |
HIP 75705 |
6.85 |
| 2026-07-29 12:00 |
15:28:17.01 |
-00:14:24.3 |
HIP 75705 |
8.99 |
| 2026-07-30 00:00 |
15:28:20.60 |
-00:16:26.0 |
HIP 75705 |
11.21 |
| 2026-07-30 12:00 |
15:28:24.53 |
-00:18:29.1 |
HIP 75705 |
13.48 |
| 2026-07-31 00:00 |
15:28:28.80 |
-00:20:33.6 |
HIP 75705 |
15.81 |
| 2026-07-31 12:00 |
15:28:33.41 |
-00:22:39.5 |
HIP 75705 |
18.21 |
| 2026-08-01 00:00 |
15:28:38.35 |
-00:24:46.8 |
HIP 75688 |
17.87 |
| 2026-08-01 12:00 |
15:28:43.63 |
-00:26:55.6 |
HIP 75688 |
17.57 |
| 2026-08-02 00:00 |
15:28:49.24 |
-00:29:05.6 |
HIP 75688 |
17.69 |
| 2026-08-02 12:00 |
15:28:55.19 |
-00:31:17.1 |
HIP 75688 |
18.25 |
| 2026-08-03 00:00 |
15:29:01.47 |
-00:33:29.8 |
HIP 75688 |
19.24 |
| 2026-08-03 12:00 |
15:29:08.09 |
-00:35:43.9 |
HIP 75688 |
20.63 |
| 2026-08-04 00:00 |
15:29:15.04 |
-00:37:59.3 |
HIP 75688 |
22.37 |
| 2026-08-04 12:00 |
15:29:22.32 |
-00:40:15.9 |
HIP 75938 |
21.31 |
| 2026-08-05 00:00 |
15:29:29.93 |
-00:42:33.8 |
HIP 75938 |
18.54 |
| 2026-08-05 12:00 |
15:29:37.87 |
-00:44:53.0 |
HIP 75938 |
15.76 |
| 2026-08-06 00:00 |
15:29:46.15 |
-00:47:13.4 |
HIP 75938 |
13.02 |
| 2026-08-06 12:00 |
15:29:54.75 |
-00:49:35.0 |
HIP 75938 |
10.41 |
| 2026-08-07 00:00 |
15:30:03.69 |
-00:51:57.8 |
HIP 75938 |
8.14 |
| 2026-08-07 12:00 |
15:30:12.95 |
-00:54:21.7 |
HIP 75938 |
6.68 |
| 2026-08-08 00:00 |
15:30:22.54 |
-00:56:46.9 |
HIP 75938 |
6.70 |
| 2026-08-08 12:00 |
15:30:32.46 |
-00:59:13.1 |
HIP 75938 |
8.28 |
| 2026-08-09 00:00 |
15:30:42.70 |
-01:01:40.6 |
HIP 75938 |
10.82 |
| 2026-08-09 12:00 |
15:30:53.27 |
-01:04:09.1 |
HIP 75938 |
13.86 |
| 2026-08-10 00:00 |
15:31:04.16 |
-01:06:38.7 |
HIP 75923 |
15.83 |
| 2026-08-10 12:00 |
15:31:15.38 |
-01:09:09.3 |
HIP 75923 |
16.02 |
| 2026-08-11 00:00 |
15:31:26.93 |
-01:11:41.1 |
HIP 75923 |
17.12 |
| 2026-08-11 12:00 |
15:31:38.80 |
-01:14:13.8 |
HIP 75923 |
19.03 |
| 2026-08-12 00:00 |
15:31:50.98 |
-01:16:47.6 |
HIP 76133 |
17.65 |
| 2026-08-12 12:00 |
15:32:03.49 |
-01:19:22.4 |
HIP 76133 |
15.89 |
| 2026-08-13 00:00 |
15:32:16.33 |
-01:21:58.2 |
HIP 76133 |
14.99 |
| 2026-08-13 12:00 |
15:32:29.48 |
-01:24:34.9 |
HIP 76133 |
15.18 |
| 2026-08-14 00:00 |
15:32:42.94 |
-01:27:12.5 |
HIP 76133 |
16.46 |
| 2026-08-14 12:00 |
15:32:56.73 |
-01:29:51.1 |
HIP 76133 |
18.68 |
| 2026-08-15 00:00 |
15:33:10.83 |
-01:32:30.6 |
HIP 76091 |
18.59 |
| 2026-08-15 12:00 |
15:33:25.25 |
-01:35:11.0 |
HIP 76246 |
18.00 |
| 2026-08-16 00:00 |
15:33:39.98 |
-01:37:52.2 |
HIP 76246 |
16.45 |
| 2026-08-16 12:00 |
15:33:55.02 |
-01:40:34.3 |
HIP 76246 |
16.06 |
| 2026-08-17 00:00 |
15:34:10.38 |
-01:43:17.2 |
HIP 76246 |
16.95 |
| 2026-08-17 12:00 |
15:34:26.04 |
-01:46:00.9 |
HIP 76246 |
19.02 |
| 2026-08-18 00:00 |
15:34:42.01 |
-01:48:45.5 |
HIP 76246 |
21.97 |
| 2026-08-18 12:00 |
15:34:58.30 |
-01:51:30.8 |
HIP 76246 |
25.54 |
| 2026-08-19 00:00 |
15:35:14.88 |
-01:54:16.8 |
HIP 76246 |
29.53 |