메타데이터
| 항목 |
값 |
| Designation |
108P/Ciffreo |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2021-10-11T05:28:33.585600Z |
| Orbit solution date (soln_date, UTC) |
2022-08-16T21:15:23Z |
| Obs used |
2301 |
| NEO |
- |
| M1 |
10.900 |
| K1 |
19.500 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2018-05-19.0000000 |
| e |
0.58101345 |
| q (au) |
1.526125 |
| a (au) |
3.642420 |
| i (deg) |
13.980156 |
| Ω (om, deg) |
52.402395 |
| ω (w, deg) |
356.861707 |
| M (ma, deg) |
184.017042 |
밝기
산란 + 전체 선형
$$
M_a = (11.226 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
11.226 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.500 |
| 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) |
| 2026-05-12 00:00 |
16:13:45.98 |
-24:24:07.8 |
HIP 79530 |
1.20 |
| 2026-05-12 12:00 |
16:13:26.79 |
-24:23:49.2 |
HIP 79530 |
4.52 |
| 2026-05-13 00:00 |
16:13:07.52 |
-24:23:30.0 |
HIP 79530 |
8.84 |
| 2026-05-13 12:00 |
16:12:48.17 |
-24:23:10.4 |
HIP 79530 |
13.23 |
| 2026-05-14 00:00 |
16:12:28.75 |
-24:22:50.2 |
HIP 79530 |
17.65 |
| 2026-05-14 12:00 |
16:12:09.25 |
-24:22:29.6 |
HIP 79530 |
22.10 |
| 2026-05-15 00:00 |
16:11:49.67 |
-24:22:08.4 |
HIP 79229 |
26.06 |
| 2026-05-15 12:00 |
16:11:30.03 |
-24:21:46.8 |
HIP 79229 |
22.49 |
| 2026-05-16 00:00 |
16:11:10.33 |
-24:21:24.7 |
HIP 79229 |
19.29 |
| 2026-05-16 12:00 |
16:10:50.56 |
-24:21:02.1 |
HIP 79229 |
16.70 |
| 2026-05-17 00:00 |
16:10:30.73 |
-24:20:39.1 |
HIP 79229 |
15.06 |
| 2026-05-17 12:00 |
16:10:10.85 |
-24:20:15.6 |
HIP 79229 |
14.68 |
| 2026-05-18 00:00 |
16:09:50.91 |
-24:19:51.6 |
HIP 79229 |
15.69 |
| 2026-05-18 12:00 |
16:09:30.92 |
-24:19:27.1 |
HIP 79229 |
17.85 |
| 2026-05-19 00:00 |
16:09:10.89 |
-24:19:02.2 |
HIP 79031 |
19.98 |
| 2026-05-19 12:00 |
16:08:50.81 |
-24:18:36.9 |
HIP 79031 |
16.22 |
| 2026-05-20 00:00 |
16:08:30.70 |
-24:18:11.1 |
HIP 79031 |
13.01 |
| 2026-05-20 12:00 |
16:08:10.54 |
-24:17:44.9 |
HIP 79031 |
10.85 |
| 2026-05-21 00:00 |
16:07:50.36 |
-24:17:18.2 |
HIP 79031 |
10.44 |
| 2026-05-21 12:00 |
16:07:30.14 |
-24:16:51.2 |
HIP 79031 |
11.96 |
| 2026-05-22 00:00 |
16:07:09.89 |
-24:16:23.7 |
HIP 79031 |
14.84 |
| 2026-05-22 12:00 |
16:06:49.62 |
-24:15:55.8 |
HIP 79031 |
18.45 |
| 2026-05-23 00:00 |
16:06:29.33 |
-24:15:27.4 |
HIP 79031 |
22.46 |
| 2026-05-23 12:00 |
16:06:09.02 |
-24:14:58.7 |
HIP 78746 |
23.01 |
| 2026-05-24 00:00 |
16:05:48.70 |
-24:14:29.6 |
HIP 78746 |
18.60 |
| 2026-05-24 12:00 |
16:05:28.36 |
-24:14:00.1 |
HIP 78746 |
14.34 |
| 2026-05-25 00:00 |
16:05:08.02 |
-24:13:30.2 |
HIP 78746 |
10.44 |
| 2026-05-25 12:00 |
16:04:47.67 |
-24:12:59.9 |
HIP 78746 |
7.47 |
| 2026-05-26 00:00 |
16:04:27.32 |
-24:12:29.3 |
HIP 78746 |
6.79 |
| 2026-05-26 12:00 |
16:04:06.96 |
-24:11:58.2 |
HIP 78746 |
8.94 |
| 2026-05-27 00:00 |
16:03:46.61 |
-24:11:26.9 |
HIP 78746 |
12.54 |
| 2026-05-27 12:00 |
16:03:26.27 |
-24:10:55.1 |
HIP 78746 |
16.68 |
| 2026-05-28 00:00 |
16:03:05.94 |
-24:10:23.1 |
HIP 78746 |
21.04 |
| 2026-05-28 12:00 |
16:02:45.61 |
-24:09:50.7 |
HIP 78510 |
17.70 |
| 2026-05-29 00:00 |
16:02:25.31 |
-24:09:17.9 |
HIP 78510 |
14.44 |
| 2026-05-29 12:00 |
16:02:05.02 |
-24:08:44.9 |
HIP 78510 |
12.12 |
| 2026-05-30 00:00 |
16:01:44.75 |
-24:08:11.5 |
HIP 78482 |
9.11 |
| 2026-05-30 12:00 |
16:01:24.50 |
-24:07:37.8 |
HIP 78482 |
6.24 |
| 2026-05-31 00:00 |
16:01:04.28 |
-24:07:03.8 |
HIP 78482 |
6.17 |
| 2026-05-31 12:00 |
16:00:44.10 |
-24:06:29.6 |
HIP 78482 |
8.96 |
| 2026-06-01 00:00 |
16:00:23.94 |
-24:05:55.0 |
HIP 78482 |
12.86 |
| 2026-06-01 12:00 |
16:00:03.82 |
-24:05:20.2 |
HIP 78482 |
17.12 |
| 2026-06-02 00:00 |
15:59:43.74 |
-24:04:45.1 |
HIP 78251 |
18.60 |