메타데이터
| 항목 |
값 |
| Designation |
C/2018 R4 (Fuls) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2018-03-03T15:59:10.642560Z |
| Orbit solution date (soln_date, UTC) |
2022-06-20T23:12:32Z |
| Obs used |
114 |
| NEO |
- |
| M1 |
16.300 |
| K1 |
4.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2018-09-09T07:28:08.544000Z |
| Discovery magnitude (MPC) |
19.10 G |
| Discovery observatory (MPC) |
703 · University of Arizona Catalina Sky Survey |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2018-09-02.0000000 |
| e |
0.99435878 |
| q (au) |
1.709214 |
| a (au) |
302.986704 |
| i (deg) |
11.682034 |
| Ω (om, deg) |
298.460925 |
| ω (w, deg) |
345.148323 |
| M (ma, deg) |
0.034075 |
밝기
산란 + 전체 선형
$$
M_a = (16.140 + 3.865\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
16.140 |
| n |
3.865 |
| gf |
1.000 |
| gb |
-0.685 |
| 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
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-06-01 00:00 |
04:35:49.34 |
+30:16:49.1 |
HIP 21516 |
19.71 |
| 2026-06-01 12:00 |
04:35:55.90 |
+30:17:00.3 |
HIP 21516 |
18.33 |
| 2026-06-02 00:00 |
04:36:02.46 |
+30:17:11.6 |
HIP 21516 |
16.95 |
| 2026-06-02 12:00 |
04:36:09.01 |
+30:17:22.9 |
HIP 21516 |
15.58 |
| 2026-06-03 00:00 |
04:36:15.57 |
+30:17:34.3 |
HIP 21516 |
14.23 |
| 2026-06-03 12:00 |
04:36:22.12 |
+30:17:45.8 |
HIP 21516 |
12.89 |
| 2026-06-04 00:00 |
04:36:28.67 |
+30:17:57.4 |
HIP 21516 |
11.57 |
| 2026-06-04 12:00 |
04:36:35.22 |
+30:18:09.0 |
HIP 21516 |
10.28 |
| 2026-06-05 00:00 |
04:36:41.76 |
+30:18:20.7 |
HIP 21516 |
9.03 |
| 2026-06-05 12:00 |
04:36:48.30 |
+30:18:32.4 |
HIP 21516 |
7.85 |
| 2026-06-06 00:00 |
04:36:54.84 |
+30:18:44.3 |
HIP 21516 |
6.75 |
| 2026-06-06 12:00 |
04:37:01.37 |
+30:18:56.2 |
HIP 21516 |
5.80 |
| 2026-06-07 00:00 |
04:37:07.89 |
+30:19:08.1 |
HIP 21516 |
5.07 |
| 2026-06-07 12:00 |
04:37:14.42 |
+30:19:20.1 |
HIP 21516 |
4.67 |
| 2026-06-08 00:00 |
04:37:20.93 |
+30:19:32.2 |
HIP 21516 |
4.69 |
| 2026-06-08 12:00 |
04:37:27.45 |
+30:19:44.4 |
HIP 21516 |
5.11 |
| 2026-06-09 00:00 |
04:37:33.95 |
+30:19:56.6 |
HIP 21566 |
5.14 |
| 2026-06-09 12:00 |
04:37:40.45 |
+30:20:08.9 |
HIP 21566 |
4.44 |
| 2026-06-10 00:00 |
04:37:46.94 |
+30:20:21.2 |
HIP 21566 |
4.12 |
| 2026-06-10 12:00 |
04:37:53.43 |
+30:20:33.6 |
HIP 21566 |
4.27 |
| 2026-06-11 00:00 |
04:37:59.91 |
+30:20:46.1 |
HIP 21566 |
4.85 |
| 2026-06-11 12:00 |
04:38:06.38 |
+30:20:58.6 |
HIP 21566 |
5.72 |
| 2026-06-12 00:00 |
04:38:12.84 |
+30:21:11.2 |
HIP 21566 |
6.78 |
| 2026-06-12 12:00 |
04:38:19.29 |
+30:21:23.8 |
HIP 21566 |
7.94 |
| 2026-06-13 00:00 |
04:38:25.73 |
+30:21:36.5 |
HIP 21566 |
9.17 |
| 2026-06-13 12:00 |
04:38:32.17 |
+30:21:49.3 |
HIP 21566 |
10.44 |
| 2026-06-14 00:00 |
04:38:38.59 |
+30:22:02.1 |
HIP 21566 |
11.74 |
| 2026-06-14 12:00 |
04:38:45.01 |
+30:22:15.0 |
HIP 21566 |
13.06 |
| 2026-06-15 00:00 |
04:38:51.41 |
+30:22:27.9 |
HIP 21566 |
14.39 |
| 2026-06-15 12:00 |
04:38:57.81 |
+30:22:40.8 |
HIP 21566 |
15.73 |
| 2026-06-16 00:00 |
04:39:04.19 |
+30:22:53.9 |
HIP 21566 |
17.08 |
| 2026-06-16 12:00 |
04:39:10.56 |
+30:23:06.9 |
HIP 21566 |
18.43 |
| 2026-06-17 00:00 |
04:39:16.92 |
+30:23:20.1 |
HIP 21573 |
19.67 |
| 2026-06-17 12:00 |
04:39:23.26 |
+30:23:33.2 |
HIP 21783 |
19.01 |
| 2026-06-18 00:00 |
04:39:29.60 |
+30:23:46.5 |
HIP 21783 |
17.80 |
| 2026-06-18 12:00 |
04:39:35.92 |
+30:23:59.7 |
HIP 21783 |
16.61 |
| 2026-06-19 00:00 |
04:39:42.22 |
+30:24:13.1 |
HIP 21783 |
15.46 |
| 2026-06-19 12:00 |
04:39:48.51 |
+30:24:26.4 |
HIP 21783 |
14.36 |
| 2026-06-20 00:00 |
04:39:54.79 |
+30:24:39.9 |
HIP 21783 |
13.31 |
| 2026-06-20 12:00 |
04:40:01.05 |
+30:24:53.3 |
HIP 21783 |
12.33 |
| 2026-06-21 00:00 |
04:40:07.30 |
+30:25:06.8 |
HIP 21783 |
11.42 |
| 2026-06-21 12:00 |
04:40:13.53 |
+30:25:20.4 |
HIP 21783 |
10.63 |
| 2026-06-22 00:00 |
04:40:19.75 |
+30:25:34.0 |
HIP 21783 |
9.95 |