메타데이터
| 항목 |
값 |
| Designation |
72P/Denning-Fujikawa |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2014-07-12T06:43:54.975360Z |
| Orbit solution date (soln_date, UTC) |
2023-11-14T12:33:10Z |
| Obs used |
66 |
| NEO |
Yes |
| M1 |
17.500 |
| K1 |
19.000 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2015-09-21.0000000 |
| e |
0.82045974 |
| q (au) |
0.780529 |
| a (au) |
4.347375 |
| i (deg) |
9.232915 |
| Ω (om, deg) |
35.435635 |
| ω (w, deg) |
338.472965 |
| M (ma, deg) |
47.377307 |
밝기
산란 + 전체 선형
$$
M_a = (17.746 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
17.746 |
| n |
6.000 |
| gf |
0.998 |
| gb |
-1.000 |
| k |
0.871 |
| 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 |
12:10:52.23 |
+04:52:10.9 |
HIP 59479 |
32.76 |
| 2026-03-26 12:00 |
12:10:37.01 |
+04:53:38.0 |
HIP 59479 |
33.66 |
| 2026-03-27 00:00 |
12:10:21.81 |
+04:55:04.8 |
HIP 59301 |
32.71 |
| 2026-03-27 12:00 |
12:10:06.62 |
+04:56:31.1 |
HIP 59301 |
30.83 |
| 2026-03-28 00:00 |
12:09:51.46 |
+04:57:57.0 |
HIP 59301 |
29.39 |
| 2026-03-28 12:00 |
12:09:36.32 |
+04:59:22.5 |
HIP 59301 |
28.46 |
| 2026-03-29 00:00 |
12:09:21.20 |
+05:00:47.6 |
HIP 59301 |
28.09 |
| 2026-03-29 12:00 |
12:09:06.10 |
+05:02:12.2 |
HIP 59301 |
28.30 |
| 2026-03-30 00:00 |
12:08:51.04 |
+05:03:36.4 |
HIP 59301 |
29.07 |
| 2026-03-30 12:00 |
12:08:36.00 |
+05:05:00.1 |
HIP 59063 |
30.35 |
| 2026-03-31 00:00 |
12:08:20.99 |
+05:06:23.3 |
HIP 59063 |
26.38 |
| 2026-03-31 12:00 |
12:08:06.02 |
+05:07:46.1 |
HIP 59063 |
22.43 |
| 2026-04-01 00:00 |
12:07:51.08 |
+05:09:08.3 |
HIP 59063 |
18.49 |
| 2026-04-01 12:00 |
12:07:36.17 |
+05:10:30.0 |
HIP 59063 |
14.59 |
| 2026-04-02 00:00 |
12:07:21.30 |
+05:11:51.3 |
HIP 59063 |
10.74 |
| 2026-04-02 12:00 |
12:07:06.48 |
+05:13:12.0 |
HIP 59063 |
7.01 |
| 2026-04-03 00:00 |
12:06:51.69 |
+05:14:32.2 |
HIP 59063 |
3.72 |
| 2026-04-03 12:00 |
12:06:36.95 |
+05:15:51.8 |
HIP 59063 |
3.03 |
| 2026-04-04 00:00 |
12:06:22.25 |
+05:17:10.9 |
HIP 59063 |
5.91 |
| 2026-04-04 12:00 |
12:06:07.60 |
+05:18:29.4 |
HIP 59002 |
5.09 |
| 2026-04-05 00:00 |
12:05:52.99 |
+05:19:47.4 |
HIP 59002 |
1.73 |
| 2026-04-05 12:00 |
12:05:38.44 |
+05:21:04.7 |
HIP 59002 |
3.14 |
| 2026-04-06 00:00 |
12:05:23.93 |
+05:22:21.5 |
HIP 59002 |
6.79 |
| 2026-04-06 12:00 |
12:05:09.48 |
+05:23:37.7 |
HIP 59002 |
10.55 |
| 2026-04-07 00:00 |
12:04:55.09 |
+05:24:53.3 |
HIP 59002 |
14.33 |
| 2026-04-07 12:00 |
12:04:40.75 |
+05:26:08.2 |
HIP 58809 |
15.80 |
| 2026-04-08 00:00 |
12:04:26.46 |
+05:27:22.6 |
HIP 58809 |
12.09 |
| 2026-04-08 12:00 |
12:04:12.24 |
+05:28:36.3 |
HIP 58809 |
8.44 |
| 2026-04-09 00:00 |
12:03:58.08 |
+05:29:49.4 |
HIP 58809 |
4.97 |
| 2026-04-09 12:00 |
12:03:43.98 |
+05:31:01.8 |
HIP 58809 |
2.45 |
| 2026-04-10 00:00 |
12:03:29.95 |
+05:32:13.6 |
HIP 58809 |
3.84 |
| 2026-04-10 12:00 |
12:03:15.98 |
+05:33:24.7 |
HIP 58809 |
7.10 |
| 2026-04-11 00:00 |
12:03:02.08 |
+05:34:35.1 |
HIP 58809 |
10.62 |
| 2026-04-11 12:00 |
12:02:48.25 |
+05:35:44.8 |
HIP 58809 |
14.19 |
| 2026-04-12 00:00 |
12:02:34.48 |
+05:36:53.9 |
HIP 58809 |
17.76 |
| 2026-04-12 12:00 |
12:02:20.80 |
+05:38:02.2 |
HIP 58809 |
21.33 |
| 2026-04-13 00:00 |
12:02:07.18 |
+05:39:09.9 |
HIP 58809 |
24.88 |
| 2026-04-13 12:00 |
12:01:53.64 |
+05:40:16.8 |
HIP 58809 |
28.42 |
| 2026-04-14 00:00 |
12:01:40.18 |
+05:41:23.0 |
HIP 58536 |
28.92 |
| 2026-04-14 12:00 |
12:01:26.80 |
+05:42:28.5 |
HIP 58536 |
27.37 |
| 2026-04-15 00:00 |
12:01:13.49 |
+05:43:33.2 |
HIP 58536 |
26.21 |
| 2026-04-15 12:00 |
12:01:00.27 |
+05:44:37.2 |
HIP 58536 |
25.47 |
| 2026-04-16 00:00 |
12:00:47.13 |
+05:45:40.5 |
HIP 58536 |
25.18 |