메타데이터
| 항목 |
값 |
| Designation |
C/1898 F1 (Perrine) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1898-03-17T15:10:30.002880Z |
| Orbit solution date (soln_date, UTC) |
2023-10-09T20:36:13Z |
| Obs used |
327 |
| NEO |
- |
| M1 |
6.400 |
| K1 |
10.750 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
1898-05-18.0000000 |
| e |
0.98044913 |
| q (au) |
1.095263 |
| a (au) |
56.021170 |
| i (deg) |
72.529160 |
| Ω (om, deg) |
263.867101 |
| ω (w, deg) |
47.308039 |
| M (ma, deg) |
0.144250 |
밝기
산란 + 전체 선형
$$
M_a = (H_0 + n\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
- |
| n |
- |
| gf |
- |
| gb |
- |
| k |
- |
| δ90 |
- |
| 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) |
| 2026-07-29 00:00 |
06:32:21.20 |
-17:31:01.9 |
HIP 31206 |
13.18 |
| 2026-07-29 12:00 |
06:32:22.26 |
-17:31:08.2 |
HIP 31206 |
12.97 |
| 2026-07-30 00:00 |
06:32:23.32 |
-17:31:14.5 |
HIP 31206 |
12.76 |
| 2026-07-30 12:00 |
06:32:24.37 |
-17:31:21.0 |
HIP 31206 |
12.55 |
| 2026-07-31 00:00 |
06:32:25.42 |
-17:31:27.5 |
HIP 31206 |
12.34 |
| 2026-07-31 12:00 |
06:32:26.46 |
-17:31:34.1 |
HIP 31206 |
12.14 |
| 2026-08-01 00:00 |
06:32:27.49 |
-17:31:40.8 |
HIP 31206 |
11.94 |
| 2026-08-01 12:00 |
06:32:28.52 |
-17:31:47.6 |
HIP 31206 |
11.74 |
| 2026-08-02 00:00 |
06:32:29.55 |
-17:31:54.4 |
HIP 31206 |
11.54 |
| 2026-08-02 12:00 |
06:32:30.57 |
-17:32:01.3 |
HIP 31206 |
11.34 |
| 2026-08-03 00:00 |
06:32:31.58 |
-17:32:08.3 |
HIP 31206 |
11.15 |
| 2026-08-03 12:00 |
06:32:32.59 |
-17:32:15.4 |
HIP 31206 |
10.95 |
| 2026-08-04 00:00 |
06:32:33.60 |
-17:32:22.6 |
HIP 31206 |
10.77 |
| 2026-08-04 12:00 |
06:32:34.59 |
-17:32:29.8 |
HIP 31206 |
10.58 |
| 2026-08-05 00:00 |
06:32:35.59 |
-17:32:37.1 |
HIP 31206 |
10.39 |
| 2026-08-05 12:00 |
06:32:36.57 |
-17:32:44.5 |
HIP 31206 |
10.21 |
| 2026-08-06 00:00 |
06:32:37.55 |
-17:32:51.9 |
HIP 31206 |
10.03 |
| 2026-08-06 12:00 |
06:32:38.53 |
-17:32:59.5 |
HIP 31206 |
9.86 |
| 2026-08-07 00:00 |
06:32:39.50 |
-17:33:07.1 |
HIP 31206 |
9.68 |
| 2026-08-07 12:00 |
06:32:40.46 |
-17:33:14.7 |
HIP 31206 |
9.52 |
| 2026-08-08 00:00 |
06:32:41.42 |
-17:33:22.5 |
HIP 31206 |
9.35 |
| 2026-08-08 12:00 |
06:32:42.37 |
-17:33:30.3 |
HIP 31206 |
9.19 |
| 2026-08-09 00:00 |
06:32:43.32 |
-17:33:38.2 |
HIP 31206 |
9.03 |
| 2026-08-09 12:00 |
06:32:44.26 |
-17:33:46.2 |
HIP 31206 |
8.87 |
| 2026-08-10 00:00 |
06:32:45.19 |
-17:33:54.2 |
HIP 31206 |
8.72 |
| 2026-08-10 12:00 |
06:32:46.11 |
-17:34:02.3 |
HIP 31206 |
8.57 |
| 2026-08-11 00:00 |
06:32:47.03 |
-17:34:10.5 |
HIP 31206 |
8.43 |
| 2026-08-11 12:00 |
06:32:47.95 |
-17:34:18.7 |
HIP 31206 |
8.29 |
| 2026-08-12 00:00 |
06:32:48.85 |
-17:34:27.1 |
HIP 31206 |
8.16 |
| 2026-08-12 12:00 |
06:32:49.75 |
-17:34:35.4 |
HIP 31206 |
8.03 |
| 2026-08-13 00:00 |
06:32:50.65 |
-17:34:43.9 |
HIP 31206 |
7.90 |
| 2026-08-13 12:00 |
06:32:51.53 |
-17:34:52.4 |
HIP 31206 |
7.78 |
| 2026-08-14 00:00 |
06:32:52.41 |
-17:35:01.0 |
HIP 31206 |
7.67 |
| 2026-08-14 12:00 |
06:32:53.28 |
-17:35:09.7 |
HIP 31206 |
7.56 |
| 2026-08-15 00:00 |
06:32:54.15 |
-17:35:18.4 |
HIP 31206 |
7.46 |
| 2026-08-15 12:00 |
06:32:55.01 |
-17:35:27.2 |
HIP 31206 |
7.36 |
| 2026-08-16 00:00 |
06:32:55.86 |
-17:35:36.0 |
HIP 31206 |
7.27 |
| 2026-08-16 12:00 |
06:32:56.70 |
-17:35:44.9 |
HIP 31206 |
7.18 |
| 2026-08-17 00:00 |
06:32:57.54 |
-17:35:53.9 |
HIP 31206 |
7.10 |
| 2026-08-17 12:00 |
06:32:58.36 |
-17:36:02.9 |
HIP 31206 |
7.03 |
| 2026-08-18 00:00 |
06:32:59.19 |
-17:36:12.0 |
HIP 31206 |
6.96 |
| 2026-08-18 12:00 |
06:33:00.00 |
-17:36:21.2 |
HIP 31206 |
6.90 |
| 2026-08-19 00:00 |
06:33:00.81 |
-17:36:30.4 |
HIP 31206 |
6.85 |