메타데이터
| 항목 |
값 |
| Designation |
C/1941 B1 (Friend-Reese-Honda) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1941-01-20T09:04:01.920000Z |
| Orbit solution date (soln_date, UTC) |
- |
| Obs used |
29 |
| NEO |
- |
| M1 |
- |
| K1 |
- |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
1941-01-20.3778000 |
| e |
0.98122100 |
| q (au) |
0.941864 |
| a (au) |
50.155173 |
| i (deg) |
26.275600 |
| Ω (om, deg) |
329.789700 |
| ω (w, deg) |
132.731900 |
| M (ma, deg) |
0.000000 |
밝기
산란 + 전체 선형
$$
M_a = (10.927 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
10.927 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-1.000 |
| k |
0.906 |
| 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) |
| 2026-07-29 00:00 |
18:52:25.85 |
-43:46:00.2 |
HIP 92816 |
25.16 |
| 2026-07-29 12:00 |
18:52:24.07 |
-43:45:58.6 |
HIP 92816 |
25.47 |
| 2026-07-30 00:00 |
18:52:22.30 |
-43:45:56.9 |
HIP 92816 |
25.79 |
| 2026-07-30 12:00 |
18:52:20.54 |
-43:45:55.1 |
HIP 92816 |
26.10 |
| 2026-07-31 00:00 |
18:52:18.78 |
-43:45:53.3 |
HIP 92816 |
26.41 |
| 2026-07-31 12:00 |
18:52:17.04 |
-43:45:51.4 |
HIP 92816 |
26.72 |
| 2026-08-01 00:00 |
18:52:15.30 |
-43:45:49.5 |
HIP 92816 |
27.03 |
| 2026-08-01 12:00 |
18:52:13.56 |
-43:45:47.4 |
HIP 92816 |
27.34 |
| 2026-08-02 00:00 |
18:52:11.84 |
-43:45:45.3 |
HIP 92816 |
27.64 |
| 2026-08-02 12:00 |
18:52:10.12 |
-43:45:43.2 |
HIP 92816 |
27.95 |
| 2026-08-03 00:00 |
18:52:08.41 |
-43:45:41.0 |
HIP 92816 |
28.25 |
| 2026-08-03 12:00 |
18:52:06.71 |
-43:45:38.7 |
HIP 92816 |
28.55 |
| 2026-08-04 00:00 |
18:52:05.02 |
-43:45:36.3 |
HIP 92816 |
28.86 |
| 2026-08-04 12:00 |
18:52:03.33 |
-43:45:33.9 |
HIP 92816 |
29.15 |
| 2026-08-05 00:00 |
18:52:01.65 |
-43:45:31.4 |
HIP 92816 |
29.45 |
| 2026-08-05 12:00 |
18:51:59.99 |
-43:45:28.9 |
HIP 92816 |
29.75 |
| 2026-08-06 00:00 |
18:51:58.33 |
-43:45:26.3 |
HIP 92816 |
30.04 |
| 2026-08-06 12:00 |
18:51:56.68 |
-43:45:23.6 |
HIP 92816 |
30.34 |
| 2026-08-07 00:00 |
18:51:55.04 |
-43:45:20.8 |
HIP 92816 |
30.63 |
| 2026-08-07 12:00 |
18:51:53.41 |
-43:45:18.0 |
HIP 92816 |
30.92 |
| 2026-08-08 00:00 |
18:51:51.78 |
-43:45:15.2 |
HIP 92816 |
31.21 |
| 2026-08-08 12:00 |
18:51:50.17 |
-43:45:12.2 |
HIP 92382 |
31.08 |
| 2026-08-09 00:00 |
18:51:48.57 |
-43:45:09.2 |
HIP 92382 |
30.82 |
| 2026-08-09 12:00 |
18:51:46.97 |
-43:45:06.2 |
HIP 92382 |
30.57 |
| 2026-08-10 00:00 |
18:51:45.39 |
-43:45:03.0 |
HIP 92382 |
30.31 |
| 2026-08-10 12:00 |
18:51:43.81 |
-43:44:59.8 |
HIP 92382 |
30.06 |
| 2026-08-11 00:00 |
18:51:42.25 |
-43:44:56.6 |
HIP 92382 |
29.80 |
| 2026-08-11 12:00 |
18:51:40.70 |
-43:44:53.3 |
HIP 92382 |
29.55 |
| 2026-08-12 00:00 |
18:51:39.15 |
-43:44:49.9 |
HIP 92382 |
29.30 |
| 2026-08-12 12:00 |
18:51:37.62 |
-43:44:46.5 |
HIP 92382 |
29.05 |
| 2026-08-13 00:00 |
18:51:36.10 |
-43:44:42.9 |
HIP 92382 |
28.80 |
| 2026-08-13 12:00 |
18:51:34.58 |
-43:44:39.4 |
HIP 92382 |
28.55 |
| 2026-08-14 00:00 |
18:51:33.08 |
-43:44:35.8 |
HIP 92382 |
28.31 |
| 2026-08-14 12:00 |
18:51:31.59 |
-43:44:32.1 |
HIP 92382 |
28.07 |
| 2026-08-15 00:00 |
18:51:30.11 |
-43:44:28.3 |
HIP 92382 |
27.82 |
| 2026-08-15 12:00 |
18:51:28.65 |
-43:44:24.5 |
HIP 92382 |
27.58 |
| 2026-08-16 00:00 |
18:51:27.19 |
-43:44:20.6 |
HIP 92382 |
27.34 |
| 2026-08-16 12:00 |
18:51:25.74 |
-43:44:16.7 |
HIP 92382 |
27.11 |
| 2026-08-17 00:00 |
18:51:24.31 |
-43:44:12.7 |
HIP 92382 |
26.87 |
| 2026-08-17 12:00 |
18:51:22.89 |
-43:44:08.7 |
HIP 92382 |
26.63 |
| 2026-08-18 00:00 |
18:51:21.48 |
-43:44:04.6 |
HIP 92382 |
26.40 |
| 2026-08-18 12:00 |
18:51:20.08 |
-43:44:00.4 |
HIP 92382 |
26.17 |
| 2026-08-19 00:00 |
18:51:18.69 |
-43:43:56.2 |
HIP 92382 |
25.94 |