메타데이터
| 항목 |
값 |
| Designation |
C/1972 F1 (Gehrels) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1971-01-06T12:19:44.146560Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:19Z |
| Obs used |
18 |
| NEO |
- |
| M1 |
- |
| K1 |
- |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
1972-08-05.0000000 |
| e |
0.99788599 |
| q (au) |
3.276471 |
| a (au) |
1549.882081 |
| i (deg) |
175.610745 |
| Ω (om, deg) |
24.754752 |
| ω (w, deg) |
128.702717 |
| M (ma, deg) |
0.009312 |
밝기
산란 + 전체 선형
$$
M_a = (8.957 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
8.957 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.900 |
| 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) |
| 2026-07-29 00:00 |
06:40:46.94 |
+18:55:08.2 |
HIP 32023 |
8.55 |
| 2026-07-29 12:00 |
06:40:48.27 |
+18:55:06.2 |
HIP 32023 |
8.24 |
| 2026-07-30 00:00 |
06:40:49.60 |
+18:55:04.1 |
HIP 32023 |
7.93 |
| 2026-07-30 12:00 |
06:40:50.92 |
+18:55:02.1 |
HIP 32023 |
7.62 |
| 2026-07-31 00:00 |
06:40:52.24 |
+18:55:00.0 |
HIP 32023 |
7.32 |
| 2026-07-31 12:00 |
06:40:53.55 |
+18:54:57.9 |
HIP 32023 |
7.02 |
| 2026-08-01 00:00 |
06:40:54.85 |
+18:54:55.8 |
HIP 32023 |
6.72 |
| 2026-08-01 12:00 |
06:40:56.15 |
+18:54:53.8 |
HIP 32023 |
6.42 |
| 2026-08-02 00:00 |
06:40:57.44 |
+18:54:51.7 |
HIP 32023 |
6.13 |
| 2026-08-02 12:00 |
06:40:58.72 |
+18:54:49.6 |
HIP 32023 |
5.83 |
| 2026-08-03 00:00 |
06:41:00.00 |
+18:54:47.5 |
HIP 32023 |
5.55 |
| 2026-08-03 12:00 |
06:41:01.27 |
+18:54:45.4 |
HIP 32023 |
5.26 |
| 2026-08-04 00:00 |
06:41:02.54 |
+18:54:43.2 |
HIP 32023 |
4.98 |
| 2026-08-04 12:00 |
06:41:03.80 |
+18:54:41.1 |
HIP 32023 |
4.70 |
| 2026-08-05 00:00 |
06:41:05.05 |
+18:54:39.0 |
HIP 32023 |
4.43 |
| 2026-08-05 12:00 |
06:41:06.29 |
+18:54:36.9 |
HIP 32023 |
4.16 |
| 2026-08-06 00:00 |
06:41:07.53 |
+18:54:34.7 |
HIP 32023 |
3.90 |
| 2026-08-06 12:00 |
06:41:08.76 |
+18:54:32.6 |
HIP 32023 |
3.65 |
| 2026-08-07 00:00 |
06:41:09.98 |
+18:54:30.4 |
HIP 32023 |
3.40 |
| 2026-08-07 12:00 |
06:41:11.20 |
+18:54:28.3 |
HIP 32023 |
3.16 |
| 2026-08-08 00:00 |
06:41:12.40 |
+18:54:26.1 |
HIP 32023 |
2.93 |
| 2026-08-08 12:00 |
06:41:13.60 |
+18:54:24.0 |
HIP 32023 |
2.72 |
| 2026-08-09 00:00 |
06:41:14.80 |
+18:54:21.8 |
HIP 32023 |
2.52 |
| 2026-08-09 12:00 |
06:41:15.98 |
+18:54:19.6 |
HIP 32023 |
2.34 |
| 2026-08-10 00:00 |
06:41:17.16 |
+18:54:17.5 |
HIP 32023 |
2.18 |
| 2026-08-10 12:00 |
06:41:18.33 |
+18:54:15.3 |
HIP 32023 |
2.05 |
| 2026-08-11 00:00 |
06:41:19.49 |
+18:54:13.1 |
HIP 32023 |
1.95 |
| 2026-08-11 12:00 |
06:41:20.64 |
+18:54:10.9 |
HIP 32023 |
1.89 |
| 2026-08-12 00:00 |
06:41:21.79 |
+18:54:08.7 |
HIP 32023 |
1.87 |
| 2026-08-12 12:00 |
06:41:22.92 |
+18:54:06.6 |
HIP 32023 |
1.89 |
| 2026-08-13 00:00 |
06:41:24.05 |
+18:54:04.4 |
HIP 32023 |
1.94 |
| 2026-08-13 12:00 |
06:41:25.17 |
+18:54:02.2 |
HIP 32023 |
2.03 |
| 2026-08-14 00:00 |
06:41:26.28 |
+18:54:00.0 |
HIP 32023 |
2.15 |
| 2026-08-14 12:00 |
06:41:27.38 |
+18:53:57.8 |
HIP 32023 |
2.30 |
| 2026-08-15 00:00 |
06:41:28.48 |
+18:53:55.6 |
HIP 32023 |
2.46 |
| 2026-08-15 12:00 |
06:41:29.56 |
+18:53:53.4 |
HIP 32023 |
2.63 |
| 2026-08-16 00:00 |
06:41:30.64 |
+18:53:51.2 |
HIP 32023 |
2.82 |
| 2026-08-16 12:00 |
06:41:31.70 |
+18:53:49.0 |
HIP 32023 |
3.02 |
| 2026-08-17 00:00 |
06:41:32.76 |
+18:53:46.8 |
HIP 32023 |
3.22 |
| 2026-08-17 12:00 |
06:41:33.81 |
+18:53:44.6 |
HIP 32023 |
3.43 |
| 2026-08-18 00:00 |
06:41:34.85 |
+18:53:42.4 |
HIP 32023 |
3.64 |
| 2026-08-18 12:00 |
06:41:35.88 |
+18:53:40.2 |
HIP 32023 |
3.85 |
| 2026-08-19 00:00 |
06:41:36.90 |
+18:53:37.9 |
HIP 32023 |
4.07 |