메타데이터
| 항목 |
값 |
| Designation |
C/2011 U3 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2012-06-03T21:30:23.644800Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:56Z |
| Obs used |
60 |
| NEO |
- |
| M1 |
11.800 |
| K1 |
14.500 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2011-11-08.0000000 |
| e |
1.00044923 |
| q (au) |
1.071437 |
| a (au) |
-2385.059256 |
| i (deg) |
116.775956 |
| Ω (om, deg) |
228.378920 |
| ω (w, deg) |
287.823893 |
| M (ma, deg) |
-0.001768 |
밝기
산란 + 전체 선형
$$
M_a = (11.812 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
11.812 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.917 |
| k |
0.999 |
| 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) |
| 2026-03-26 00:00 |
13:16:29.05 |
+68:22:59.4 |
HIP 64774 |
1.49 |
| 2026-03-26 12:00 |
13:16:19.58 |
+68:23:21.9 |
HIP 64774 |
1.39 |
| 2026-03-27 00:00 |
13:16:10.08 |
+68:23:44.0 |
HIP 64774 |
1.86 |
| 2026-03-27 12:00 |
13:16:00.55 |
+68:24:05.6 |
HIP 64774 |
2.61 |
| 2026-03-28 00:00 |
13:15:51.00 |
+68:24:26.7 |
HIP 64774 |
3.46 |
| 2026-03-28 12:00 |
13:15:41.44 |
+68:24:47.3 |
HIP 64774 |
4.35 |
| 2026-03-29 00:00 |
13:15:31.85 |
+68:25:07.4 |
HIP 64774 |
5.26 |
| 2026-03-29 12:00 |
13:15:22.24 |
+68:25:27.0 |
HIP 64774 |
6.18 |
| 2026-03-30 00:00 |
13:15:12.62 |
+68:25:46.1 |
HIP 64774 |
7.11 |
| 2026-03-30 12:00 |
13:15:02.98 |
+68:26:04.7 |
HIP 64774 |
8.04 |
| 2026-03-31 00:00 |
13:14:53.32 |
+68:26:22.8 |
HIP 64774 |
8.97 |
| 2026-03-31 12:00 |
13:14:43.64 |
+68:26:40.4 |
HIP 64774 |
9.90 |
| 2026-04-01 00:00 |
13:14:33.95 |
+68:26:57.5 |
HIP 64774 |
10.83 |
| 2026-04-01 12:00 |
13:14:24.25 |
+68:27:14.1 |
HIP 64774 |
11.76 |
| 2026-04-02 00:00 |
13:14:14.53 |
+68:27:30.2 |
HIP 64774 |
12.69 |
| 2026-04-02 12:00 |
13:14:04.80 |
+68:27:45.7 |
HIP 64774 |
13.62 |
| 2026-04-03 00:00 |
13:13:55.06 |
+68:28:00.8 |
HIP 64774 |
14.55 |
| 2026-04-03 12:00 |
13:13:45.31 |
+68:28:15.4 |
HIP 64774 |
15.48 |
| 2026-04-04 00:00 |
13:13:35.54 |
+68:28:29.4 |
HIP 64774 |
16.40 |
| 2026-04-04 12:00 |
13:13:25.77 |
+68:28:43.0 |
HIP 64774 |
17.33 |
| 2026-04-05 00:00 |
13:13:15.99 |
+68:28:56.0 |
HIP 64774 |
18.25 |
| 2026-04-05 12:00 |
13:13:06.21 |
+68:29:08.6 |
HIP 64774 |
19.17 |
| 2026-04-06 00:00 |
13:12:56.41 |
+68:29:20.6 |
HIP 64774 |
20.09 |
| 2026-04-06 12:00 |
13:12:46.62 |
+68:29:32.1 |
HIP 64774 |
21.01 |
| 2026-04-07 00:00 |
13:12:36.81 |
+68:29:43.1 |
HIP 64774 |
21.92 |
| 2026-04-07 12:00 |
13:12:27.01 |
+68:29:53.6 |
HIP 64774 |
22.84 |
| 2026-04-08 00:00 |
13:12:17.20 |
+68:30:03.6 |
HIP 64774 |
23.75 |
| 2026-04-08 12:00 |
13:12:07.39 |
+68:30:13.1 |
HIP 64774 |
24.66 |
| 2026-04-09 00:00 |
13:11:57.57 |
+68:30:22.0 |
HIP 64774 |
25.57 |
| 2026-04-09 12:00 |
13:11:47.76 |
+68:30:30.5 |
HIP 64774 |
26.48 |
| 2026-04-10 00:00 |
13:11:37.95 |
+68:30:38.4 |
HIP 64165 |
26.94 |
| 2026-04-10 12:00 |
13:11:28.14 |
+68:30:45.8 |
HIP 64165 |
26.57 |
| 2026-04-11 00:00 |
13:11:18.33 |
+68:30:52.7 |
HIP 64165 |
26.23 |
| 2026-04-11 12:00 |
13:11:08.52 |
+68:30:59.1 |
HIP 64165 |
25.90 |
| 2026-04-12 00:00 |
13:10:58.72 |
+68:31:05.0 |
HIP 64165 |
25.59 |
| 2026-04-12 12:00 |
13:10:48.93 |
+68:31:10.4 |
HIP 64165 |
25.31 |
| 2026-04-13 00:00 |
13:10:39.14 |
+68:31:15.2 |
HIP 64165 |
25.04 |
| 2026-04-13 12:00 |
13:10:29.36 |
+68:31:19.5 |
HIP 64165 |
24.80 |
| 2026-04-14 00:00 |
13:10:19.58 |
+68:31:23.4 |
HIP 64165 |
24.59 |
| 2026-04-14 12:00 |
13:10:09.82 |
+68:31:26.7 |
HIP 64165 |
24.39 |
| 2026-04-15 00:00 |
13:10:00.06 |
+68:31:29.5 |
HIP 64165 |
24.22 |
| 2026-04-15 12:00 |
13:09:50.32 |
+68:31:31.8 |
HIP 64165 |
24.08 |
| 2026-04-16 00:00 |
13:09:40.59 |
+68:31:33.5 |
HIP 64165 |
23.96 |