메타데이터
| 항목 |
값 |
| Designation |
C/1932 Y1 (Dodwell-Forbes) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1932-12-30T12:36:55.002240Z |
| Orbit solution date (soln_date, UTC) |
2023-12-04T20:32:29Z |
| Obs used |
23 |
| NEO |
- |
| M1 |
9.100 |
| K1 |
15.250 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
1933-01-20.0000000 |
| e |
0.97216017 |
| q (au) |
1.130765 |
| a (au) |
40.616795 |
| i (deg) |
24.502460 |
| Ω (om, deg) |
78.589152 |
| ω (w, deg) |
327.357273 |
| M (ma, deg) |
0.077957 |
밝기
산란 + 전체 선형
$$
M_a = (7.943 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
7.943 |
| 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) |
| 2026-07-29 00:00 |
15:05:05.57 |
-02:54:19.6 |
HIP 73708 |
16.56 |
| 2026-07-29 12:00 |
15:05:05.28 |
-02:54:24.2 |
HIP 73708 |
16.51 |
| 2026-07-30 00:00 |
15:05:04.99 |
-02:54:28.8 |
HIP 73708 |
16.45 |
| 2026-07-30 12:00 |
15:05:04.72 |
-02:54:33.5 |
HIP 73708 |
16.40 |
| 2026-07-31 00:00 |
15:05:04.46 |
-02:54:38.3 |
HIP 73708 |
16.36 |
| 2026-07-31 12:00 |
15:05:04.21 |
-02:54:43.1 |
HIP 73708 |
16.31 |
| 2026-08-01 00:00 |
15:05:03.97 |
-02:54:48.0 |
HIP 73708 |
16.27 |
| 2026-08-01 12:00 |
15:05:03.75 |
-02:54:52.9 |
HIP 73708 |
16.24 |
| 2026-08-02 00:00 |
15:05:03.54 |
-02:54:57.9 |
HIP 73708 |
16.21 |
| 2026-08-02 12:00 |
15:05:03.34 |
-02:55:03.0 |
HIP 73708 |
16.18 |
| 2026-08-03 00:00 |
15:05:03.15 |
-02:55:08.1 |
HIP 73708 |
16.16 |
| 2026-08-03 12:00 |
15:05:02.98 |
-02:55:13.3 |
HIP 73708 |
16.14 |
| 2026-08-04 00:00 |
15:05:02.82 |
-02:55:18.5 |
HIP 73708 |
16.12 |
| 2026-08-04 12:00 |
15:05:02.67 |
-02:55:23.8 |
HIP 73708 |
16.11 |
| 2026-08-05 00:00 |
15:05:02.53 |
-02:55:29.1 |
HIP 73708 |
16.10 |
| 2026-08-05 12:00 |
15:05:02.41 |
-02:55:34.5 |
HIP 73708 |
16.09 |
| 2026-08-06 00:00 |
15:05:02.30 |
-02:55:40.0 |
HIP 73708 |
16.09 |
| 2026-08-06 12:00 |
15:05:02.20 |
-02:55:45.5 |
HIP 73708 |
16.09 |
| 2026-08-07 00:00 |
15:05:02.11 |
-02:55:51.1 |
HIP 73708 |
16.10 |
| 2026-08-07 12:00 |
15:05:02.04 |
-02:55:56.7 |
HIP 73708 |
16.11 |
| 2026-08-08 00:00 |
15:05:01.98 |
-02:56:02.4 |
HIP 73708 |
16.13 |
| 2026-08-08 12:00 |
15:05:01.93 |
-02:56:08.1 |
HIP 73708 |
16.14 |
| 2026-08-09 00:00 |
15:05:01.89 |
-02:56:13.9 |
HIP 73708 |
16.17 |
| 2026-08-09 12:00 |
15:05:01.87 |
-02:56:19.7 |
HIP 73708 |
16.19 |
| 2026-08-10 00:00 |
15:05:01.86 |
-02:56:25.6 |
HIP 73708 |
16.22 |
| 2026-08-10 12:00 |
15:05:01.86 |
-02:56:31.6 |
HIP 73708 |
16.25 |
| 2026-08-11 00:00 |
15:05:01.87 |
-02:56:37.6 |
HIP 73708 |
16.29 |
| 2026-08-11 12:00 |
15:05:01.90 |
-02:56:43.6 |
HIP 73708 |
16.33 |
| 2026-08-12 00:00 |
15:05:01.94 |
-02:56:49.7 |
HIP 73708 |
16.38 |
| 2026-08-12 12:00 |
15:05:01.99 |
-02:56:55.9 |
HIP 73708 |
16.42 |
| 2026-08-13 00:00 |
15:05:02.06 |
-02:57:02.1 |
HIP 73708 |
16.48 |
| 2026-08-13 12:00 |
15:05:02.14 |
-02:57:08.3 |
HIP 73708 |
16.53 |
| 2026-08-14 00:00 |
15:05:02.23 |
-02:57:14.6 |
HIP 73708 |
16.59 |
| 2026-08-14 12:00 |
15:05:02.33 |
-02:57:21.0 |
HIP 73708 |
16.66 |
| 2026-08-15 00:00 |
15:05:02.44 |
-02:57:27.4 |
HIP 73708 |
16.72 |
| 2026-08-15 12:00 |
15:05:02.57 |
-02:57:33.8 |
HIP 73708 |
16.79 |
| 2026-08-16 00:00 |
15:05:02.71 |
-02:57:40.3 |
HIP 73708 |
16.87 |
| 2026-08-16 12:00 |
15:05:02.87 |
-02:57:46.9 |
HIP 73708 |
16.95 |
| 2026-08-17 00:00 |
15:05:03.03 |
-02:57:53.5 |
HIP 73708 |
17.03 |
| 2026-08-17 12:00 |
15:05:03.21 |
-02:58:00.1 |
HIP 73708 |
17.11 |
| 2026-08-18 00:00 |
15:05:03.40 |
-02:58:06.8 |
HIP 73708 |
17.20 |
| 2026-08-18 12:00 |
15:05:03.60 |
-02:58:13.5 |
HIP 73708 |
17.29 |
| 2026-08-19 00:00 |
15:05:03.82 |
-02:58:20.3 |
HIP 73708 |
17.39 |