메타데이터
| 항목 |
값 |
| Designation |
P/2011 W1 (PANSTARRS) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2012-01-22T12:56:24.720000Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:58Z |
| Obs used |
171 |
| NEO |
- |
| M1 |
7.300 |
| K1 |
19.000 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2012-01-08.0000000 |
| e |
0.28865156 |
| q (au) |
3.312061 |
| a (au) |
4.656031 |
| i (deg) |
3.718613 |
| Ω (om, deg) |
161.883715 |
| ω (w, deg) |
282.472848 |
| M (ma, deg) |
358.573670 |
밝기
산란 + 전체 선형
$$
M_a = (8.152 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
8.152 |
| 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
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-07-29 00:00 |
16:11:25.03 |
-16:56:01.4 |
HIP 79395 |
19.06 |
| 2026-07-29 12:00 |
16:11:22.25 |
-16:56:13.6 |
HIP 79395 |
19.62 |
| 2026-07-30 00:00 |
16:11:19.65 |
-16:56:26.3 |
HIP 79395 |
20.17 |
| 2026-07-30 12:00 |
16:11:17.21 |
-16:56:39.5 |
HIP 79395 |
20.71 |
| 2026-07-31 00:00 |
16:11:14.95 |
-16:56:53.1 |
HIP 79395 |
21.23 |
| 2026-07-31 12:00 |
16:11:12.85 |
-16:57:07.3 |
HIP 79395 |
21.73 |
| 2026-08-01 00:00 |
16:11:10.92 |
-16:57:21.9 |
HIP 79395 |
22.22 |
| 2026-08-01 12:00 |
16:11:09.16 |
-16:57:37.0 |
HIP 79395 |
22.69 |
| 2026-08-02 00:00 |
16:11:07.58 |
-16:57:52.6 |
HIP 79395 |
23.13 |
| 2026-08-02 12:00 |
16:11:06.16 |
-16:58:08.7 |
HIP 79395 |
23.56 |
| 2026-08-03 00:00 |
16:11:04.91 |
-16:58:25.2 |
HIP 79395 |
23.96 |
| 2026-08-03 12:00 |
16:11:03.83 |
-16:58:42.2 |
HIP 79395 |
24.35 |
| 2026-08-04 00:00 |
16:11:02.92 |
-16:58:59.7 |
HIP 79395 |
24.71 |
| 2026-08-04 12:00 |
16:11:02.18 |
-16:59:17.7 |
HIP 79395 |
25.05 |
| 2026-08-05 00:00 |
16:11:01.62 |
-16:59:36.1 |
HIP 79169 |
24.78 |
| 2026-08-05 12:00 |
16:11:01.22 |
-16:59:55.0 |
HIP 79169 |
24.55 |
| 2026-08-06 00:00 |
16:11:00.99 |
-17:00:14.4 |
HIP 79169 |
24.36 |
| 2026-08-06 12:00 |
16:11:00.93 |
-17:00:34.3 |
HIP 79169 |
24.19 |
| 2026-08-07 00:00 |
16:11:01.04 |
-17:00:54.6 |
HIP 79169 |
24.07 |
| 2026-08-07 12:00 |
16:11:01.32 |
-17:01:15.3 |
HIP 79169 |
23.98 |
| 2026-08-08 00:00 |
16:11:01.77 |
-17:01:36.6 |
HIP 79169 |
23.94 |
| 2026-08-08 12:00 |
16:11:02.39 |
-17:01:58.2 |
HIP 79169 |
23.93 |
| 2026-08-09 00:00 |
16:11:03.18 |
-17:02:20.4 |
HIP 79169 |
23.96 |
| 2026-08-09 12:00 |
16:11:04.14 |
-17:02:43.0 |
HIP 79169 |
24.04 |
| 2026-08-10 00:00 |
16:11:05.27 |
-17:03:06.0 |
HIP 79169 |
24.16 |
| 2026-08-10 12:00 |
16:11:06.57 |
-17:03:29.5 |
HIP 79169 |
24.32 |
| 2026-08-11 00:00 |
16:11:08.04 |
-17:03:53.5 |
HIP 79169 |
24.53 |
| 2026-08-11 12:00 |
16:11:09.67 |
-17:04:17.9 |
HIP 79169 |
24.79 |
| 2026-08-12 00:00 |
16:11:11.48 |
-17:04:42.7 |
HIP 79169 |
25.09 |
| 2026-08-12 12:00 |
16:11:13.46 |
-17:05:08.0 |
HIP 79169 |
25.44 |
| 2026-08-13 00:00 |
16:11:15.60 |
-17:05:33.7 |
HIP 79169 |
25.84 |
| 2026-08-13 12:00 |
16:11:17.92 |
-17:05:59.9 |
HIP 79169 |
26.29 |
| 2026-08-14 00:00 |
16:11:20.40 |
-17:06:26.5 |
HIP 79169 |
26.79 |
| 2026-08-14 12:00 |
16:11:23.05 |
-17:06:53.5 |
HIP 79169 |
27.33 |
| 2026-08-15 00:00 |
16:11:25.87 |
-17:07:20.9 |
HIP 79169 |
27.93 |
| 2026-08-15 12:00 |
16:11:28.85 |
-17:07:48.8 |
HIP 79169 |
28.57 |
| 2026-08-16 00:00 |
16:11:32.00 |
-17:08:17.0 |
HIP 79395 |
29.26 |
| 2026-08-16 12:00 |
16:11:35.32 |
-17:08:45.7 |
HIP 79395 |
29.47 |
| 2026-08-17 00:00 |
16:11:38.81 |
-17:09:14.8 |
HIP 79395 |
29.70 |
| 2026-08-17 12:00 |
16:11:42.46 |
-17:09:44.3 |
HIP 79395 |
29.96 |
| 2026-08-18 00:00 |
16:11:46.27 |
-17:10:14.2 |
HIP 79395 |
30.24 |
| 2026-08-18 12:00 |
16:11:50.25 |
-17:10:44.5 |
HIP 79395 |
30.56 |
| 2026-08-19 00:00 |
16:11:54.40 |
-17:11:15.3 |
HIP 79395 |
30.92 |