메타데이터
| 항목 |
값 |
| Designation |
C/2014 F3 (Sheppard-Trujillo) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2021-05-18T09:14:56.149440Z |
| Orbit solution date (soln_date, UTC) |
2025-01-10T09:12:14Z |
| Obs used |
100 |
| NEO |
- |
| M1 |
14.400 |
| K1 |
4.500 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2020-09-10.0000000 |
| e |
0.64217219 |
| q (au) |
5.704144 |
| a (au) |
15.941031 |
| i (deg) |
6.568810 |
| Ω (om, deg) |
326.803827 |
| ω (w, deg) |
2.927768 |
| M (ma, deg) |
356.122619 |
밝기
산란 + 전체 선형
$$
M_a = (13.814 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
13.814 |
| n |
2.000 |
| gf |
0.887 |
| gb |
-0.936 |
| k |
1.000 |
| δ90 |
3.631 |
| 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
잔차 (구간 선형)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 시작일 (UTC) |
끝 (UTC) |
a |
b |
| 2014-03-26 |
2020-09-16 |
-6.4566 |
+5.035 |
| 2021-07-09 |
2024-11-25 |
-15.6318 |
+11.981 |
log10 r = log10(태양거리/AU), Δ = 지구거리(AU)
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-07-29 00:00 |
05:12:20.49 |
+28:47:16.5 |
HIP 24274 |
10.21 |
| 2026-07-29 12:00 |
05:12:31.49 |
+28:47:37.9 |
HIP 24274 |
9.34 |
| 2026-07-30 00:00 |
05:12:42.43 |
+28:47:59.3 |
HIP 24274 |
9.06 |
| 2026-07-30 12:00 |
05:12:53.30 |
+28:48:20.6 |
HIP 24274 |
9.41 |
| 2026-07-31 00:00 |
05:13:04.11 |
+28:48:41.9 |
HIP 24274 |
10.32 |
| 2026-07-31 12:00 |
05:13:14.86 |
+28:49:03.2 |
HIP 24274 |
11.65 |
| 2026-08-01 00:00 |
05:13:25.55 |
+28:49:24.4 |
HIP 24274 |
13.26 |
| 2026-08-01 12:00 |
05:13:36.17 |
+28:49:45.7 |
HIP 24274 |
15.06 |
| 2026-08-02 00:00 |
05:13:46.73 |
+28:50:06.9 |
HIP 24274 |
16.98 |
| 2026-08-02 12:00 |
05:13:57.23 |
+28:50:28.0 |
HIP 24274 |
18.98 |
| 2026-08-03 00:00 |
05:14:07.65 |
+28:50:49.2 |
HIP 24274 |
21.04 |
| 2026-08-03 12:00 |
05:14:18.01 |
+28:51:10.3 |
HIP 24274 |
23.13 |
| 2026-08-04 00:00 |
05:14:28.31 |
+28:51:31.4 |
HIP 24274 |
25.24 |
| 2026-08-04 12:00 |
05:14:38.54 |
+28:51:52.4 |
HIP 24274 |
27.36 |
| 2026-08-05 00:00 |
05:14:48.70 |
+28:52:13.5 |
HIP 24274 |
29.49 |
| 2026-08-05 12:00 |
05:14:58.79 |
+28:52:34.5 |
HIP 24642 |
29.97 |
| 2026-08-06 00:00 |
05:15:08.81 |
+28:52:55.5 |
HIP 24642 |
27.76 |
| 2026-08-06 12:00 |
05:15:18.77 |
+28:53:16.4 |
HIP 24642 |
25.56 |
| 2026-08-07 00:00 |
05:15:28.65 |
+28:53:37.3 |
HIP 24642 |
23.39 |
| 2026-08-07 12:00 |
05:15:38.47 |
+28:53:58.2 |
HIP 24642 |
21.23 |
| 2026-08-08 00:00 |
05:15:48.21 |
+28:54:19.1 |
HIP 24642 |
19.10 |
| 2026-08-08 12:00 |
05:15:57.88 |
+28:54:39.9 |
HIP 24642 |
16.98 |
| 2026-08-09 00:00 |
05:16:07.48 |
+28:55:00.7 |
HIP 24642 |
14.89 |
| 2026-08-09 12:00 |
05:16:17.01 |
+28:55:21.4 |
HIP 24642 |
12.84 |
| 2026-08-10 00:00 |
05:16:26.47 |
+28:55:42.2 |
HIP 24642 |
10.81 |
| 2026-08-10 12:00 |
05:16:35.85 |
+28:56:02.9 |
HIP 24642 |
8.84 |
| 2026-08-11 00:00 |
05:16:45.15 |
+28:56:23.6 |
HIP 24642 |
6.96 |
| 2026-08-11 12:00 |
05:16:54.38 |
+28:56:44.2 |
HIP 24642 |
5.22 |
| 2026-08-12 00:00 |
05:17:03.54 |
+28:57:04.8 |
HIP 24642 |
3.81 |
| 2026-08-12 12:00 |
05:17:12.62 |
+28:57:25.4 |
HIP 24642 |
3.18 |
| 2026-08-13 00:00 |
05:17:21.62 |
+28:57:45.9 |
HIP 24642 |
3.72 |
| 2026-08-13 12:00 |
05:17:30.55 |
+28:58:06.4 |
HIP 24642 |
5.04 |
| 2026-08-14 00:00 |
05:17:39.40 |
+28:58:26.9 |
HIP 24642 |
6.68 |
| 2026-08-14 12:00 |
05:17:48.17 |
+28:58:47.4 |
HIP 24642 |
8.45 |
| 2026-08-15 00:00 |
05:17:56.86 |
+28:59:07.8 |
HIP 24642 |
10.26 |
| 2026-08-15 12:00 |
05:18:05.48 |
+28:59:28.1 |
HIP 24642 |
12.10 |
| 2026-08-16 00:00 |
05:18:14.01 |
+28:59:48.5 |
HIP 24735 |
13.01 |
| 2026-08-16 12:00 |
05:18:22.47 |
+29:00:08.8 |
HIP 24735 |
13.43 |
| 2026-08-17 00:00 |
05:18:30.84 |
+29:00:29.1 |
HIP 24735 |
14.09 |
| 2026-08-17 12:00 |
05:18:39.14 |
+29:00:49.3 |
HIP 24735 |
14.95 |
| 2026-08-18 00:00 |
05:18:47.35 |
+29:01:09.5 |
HIP 24735 |
15.96 |
| 2026-08-18 12:00 |
05:18:55.48 |
+29:01:29.7 |
HIP 24735 |
17.11 |
| 2026-08-19 00:00 |
05:19:03.53 |
+29:01:49.8 |
HIP 24735 |
18.35 |