메타데이터
| 항목 |
값 |
| Designation |
112P/Urata-Niijima |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2013-06-24T12:01:14.373120Z |
| Orbit solution date (soln_date, UTC) |
2021-09-20T10:16:48Z |
| Obs used |
617 |
| NEO |
- |
| M1 |
14.500 |
| K1 |
15.000 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2010-10-02.0000000 |
| e |
0.58749274 |
| q (au) |
1.458798 |
| a (au) |
3.536417 |
| i (deg) |
24.201453 |
| Ω (om, deg) |
31.931835 |
| ω (w, deg) |
21.352202 |
| M (ma, deg) |
212.314948 |
밝기
산란 + 전체 선형
$$
M_a = (14.858 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
14.858 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-1.000 |
| k |
0.800 |
| 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) |
| 2026-06-01 00:00 |
01:20:43.33 |
-06:46:35.5 |
HIP 6331 |
37.99 |
| 2026-06-01 12:00 |
01:21:48.40 |
-06:37:33.2 |
HIP 6331 |
29.02 |
| 2026-06-02 00:00 |
01:22:53.55 |
-06:28:29.7 |
HIP 6331 |
30.46 |
| 2026-06-02 12:00 |
01:23:58.76 |
-06:19:25.1 |
HIP 6624 |
27.36 |
| 2026-06-03 00:00 |
01:25:04.05 |
-06:10:19.2 |
HIP 6624 |
13.56 |
| 2026-06-03 12:00 |
01:26:09.42 |
-06:01:12.2 |
HIP 6624 |
17.68 |
| 2026-06-04 00:00 |
01:27:14.86 |
-05:52:04.1 |
HIP 6912 |
28.33 |
| 2026-06-04 12:00 |
01:28:20.38 |
-05:42:54.7 |
HIP 6912 |
10.25 |
| 2026-06-05 00:00 |
01:29:25.98 |
-05:33:44.1 |
HIP 6984 |
7.18 |
| 2026-06-05 12:00 |
01:30:31.66 |
-05:24:32.4 |
HIP 7070 |
12.17 |
| 2026-06-06 00:00 |
01:31:37.42 |
-05:15:19.5 |
HIP 7124 |
17.95 |
| 2026-06-06 12:00 |
01:32:43.26 |
-05:06:05.4 |
HIP 7124 |
16.31 |
| 2026-06-07 00:00 |
01:33:49.18 |
-04:56:50.1 |
HIP 7347 |
25.21 |
| 2026-06-07 12:00 |
01:34:55.18 |
-04:47:33.7 |
HIP 7347 |
13.01 |
| 2026-06-08 00:00 |
01:36:01.26 |
-04:38:16.0 |
HIP 7347 |
20.41 |
| 2026-06-08 12:00 |
01:37:07.43 |
-04:28:57.1 |
HIP 7546 |
20.43 |
| 2026-06-09 00:00 |
01:38:13.68 |
-04:19:37.1 |
HIP 7546 |
18.68 |
| 2026-06-09 12:00 |
01:39:20.01 |
-04:10:15.9 |
HIP 7802 |
23.57 |
| 2026-06-10 00:00 |
01:40:26.44 |
-04:00:53.5 |
HIP 7802 |
26.86 |
| 2026-06-10 12:00 |
01:41:32.94 |
-03:51:29.9 |
HIP 7999 |
20.29 |
| 2026-06-11 00:00 |
01:42:39.54 |
-03:42:05.1 |
HIP 7999 |
1.20 |
| 2026-06-11 12:00 |
01:43:46.22 |
-03:32:39.1 |
HIP 7999 |
17.93 |
| 2026-06-12 00:00 |
01:44:52.98 |
-03:23:12.0 |
HIP 8196 |
14.86 |
| 2026-06-12 12:00 |
01:45:59.84 |
-03:13:43.6 |
HIP 8196 |
10.24 |
| 2026-06-13 00:00 |
01:47:06.79 |
-03:04:14.1 |
HIP 8302 |
2.79 |
| 2026-06-13 12:00 |
01:48:13.82 |
-02:54:43.4 |
HIP 8339 |
10.07 |
| 2026-06-14 00:00 |
01:49:20.94 |
-02:45:11.5 |
HIP 8339 |
28.48 |
| 2026-06-14 12:00 |
01:50:28.16 |
-02:35:38.4 |
HIP 8661 |
17.23 |
| 2026-06-15 00:00 |
01:51:35.47 |
-02:26:04.1 |
HIP 8661 |
12.20 |
| 2026-06-15 12:00 |
01:52:42.86 |
-02:16:28.6 |
HIP 8661 |
27.40 |
| 2026-06-16 00:00 |
01:53:50.35 |
-02:06:51.9 |
HIP 8661 |
45.90 |
| 2026-06-16 12:00 |
01:54:57.94 |
-01:57:14.0 |
HIP 9098 |
36.40 |
| 2026-06-17 00:00 |
01:56:05.61 |
-01:47:34.9 |
HIP 9098 |
17.20 |
| 2026-06-17 12:00 |
01:57:13.38 |
-01:37:54.6 |
HIP 9098 |
5.05 |
| 2026-06-18 00:00 |
01:58:21.25 |
-01:28:13.1 |
HIP 9098 |
22.74 |
| 2026-06-18 12:00 |
01:59:29.21 |
-01:18:30.4 |
HIP 9395 |
22.04 |
| 2026-06-19 00:00 |
02:00:37.28 |
-01:08:46.5 |
HIP 9395 |
2.46 |
| 2026-06-19 12:00 |
02:01:45.44 |
-00:59:01.4 |
HIP 9444 |
8.45 |
| 2026-06-20 00:00 |
02:02:53.69 |
-00:49:15.0 |
HIP 9591 |
17.28 |
| 2026-06-20 12:00 |
02:04:02.05 |
-00:39:27.4 |
HIP 9631 |
19.36 |
| 2026-06-21 00:00 |
02:05:10.52 |
-00:29:38.6 |
HIP 9631 |
22.57 |
| 2026-06-21 12:00 |
02:06:19.08 |
-00:19:48.5 |
HIP 9827 |
22.08 |
| 2026-06-22 00:00 |
02:07:27.75 |
-00:09:57.2 |
HIP 9827 |
18.96 |