메타데이터
| 항목 |
값 |
| Designation |
C/1939 H1 (Jurlof-Achmarof-Hassel) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1939-04-10T02:44:02.135040Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:05Z |
| Obs used |
14 |
| NEO |
- |
| M1 |
6.000 |
| K1 |
4.500 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
1939-05-07.0000000 |
| e |
0.99150316 |
| q (au) |
0.528255 |
| a (au) |
62.170794 |
| i (deg) |
138.167852 |
| Ω (om, deg) |
312.348989 |
| ω (w, deg) |
89.151721 |
| M (ma, deg) |
0.054057 |
밝기
산란 + 전체 선형
$$
M_a = (5.872 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
5.872 |
| n |
2.000 |
| gf |
0.800 |
| gb |
-0.500 |
| k |
0.965 |
| δ90 |
1.000 |
| 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 |
03:55:36.23 |
-22:11:42.8 |
HIP 18248 |
23.18 |
| 2026-07-29 12:00 |
03:55:36.81 |
-22:11:53.9 |
HIP 18248 |
23.21 |
| 2026-07-30 00:00 |
03:55:37.37 |
-22:12:05.1 |
HIP 18248 |
23.23 |
| 2026-07-30 12:00 |
03:55:37.93 |
-22:12:16.3 |
HIP 18248 |
23.26 |
| 2026-07-31 00:00 |
03:55:38.47 |
-22:12:27.6 |
HIP 18248 |
23.29 |
| 2026-07-31 12:00 |
03:55:39.00 |
-22:12:39.0 |
HIP 18248 |
23.32 |
| 2026-08-01 00:00 |
03:55:39.52 |
-22:12:50.4 |
HIP 18248 |
23.34 |
| 2026-08-01 12:00 |
03:55:40.03 |
-22:13:01.9 |
HIP 18248 |
23.37 |
| 2026-08-02 00:00 |
03:55:40.53 |
-22:13:13.5 |
HIP 18248 |
23.39 |
| 2026-08-02 12:00 |
03:55:41.02 |
-22:13:25.1 |
HIP 18248 |
23.42 |
| 2026-08-03 00:00 |
03:55:41.50 |
-22:13:36.8 |
HIP 18248 |
23.44 |
| 2026-08-03 12:00 |
03:55:41.96 |
-22:13:48.6 |
HIP 18248 |
23.46 |
| 2026-08-04 00:00 |
03:55:42.42 |
-22:14:00.4 |
HIP 18248 |
23.48 |
| 2026-08-04 12:00 |
03:55:42.86 |
-22:14:12.3 |
HIP 18248 |
23.51 |
| 2026-08-05 00:00 |
03:55:43.30 |
-22:14:24.3 |
HIP 18248 |
23.53 |
| 2026-08-05 12:00 |
03:55:43.72 |
-22:14:36.3 |
HIP 18248 |
23.55 |
| 2026-08-06 00:00 |
03:55:44.13 |
-22:14:48.4 |
HIP 18248 |
23.57 |
| 2026-08-06 12:00 |
03:55:44.53 |
-22:15:00.6 |
HIP 18248 |
23.58 |
| 2026-08-07 00:00 |
03:55:44.92 |
-22:15:12.8 |
HIP 18248 |
23.60 |
| 2026-08-07 12:00 |
03:55:45.29 |
-22:15:25.1 |
HIP 18248 |
23.62 |
| 2026-08-08 00:00 |
03:55:45.66 |
-22:15:37.4 |
HIP 18248 |
23.64 |
| 2026-08-08 12:00 |
03:55:46.01 |
-22:15:49.8 |
HIP 18248 |
23.65 |
| 2026-08-09 00:00 |
03:55:46.35 |
-22:16:02.2 |
HIP 18248 |
23.67 |
| 2026-08-09 12:00 |
03:55:46.69 |
-22:16:14.7 |
HIP 18248 |
23.68 |
| 2026-08-10 00:00 |
03:55:47.00 |
-22:16:27.3 |
HIP 18248 |
23.69 |
| 2026-08-10 12:00 |
03:55:47.31 |
-22:16:39.9 |
HIP 18248 |
23.71 |
| 2026-08-11 00:00 |
03:55:47.61 |
-22:16:52.6 |
HIP 18248 |
23.72 |
| 2026-08-11 12:00 |
03:55:47.89 |
-22:17:05.3 |
HIP 18248 |
23.73 |
| 2026-08-12 00:00 |
03:55:48.16 |
-22:17:18.1 |
HIP 18248 |
23.74 |
| 2026-08-12 12:00 |
03:55:48.43 |
-22:17:30.9 |
HIP 18248 |
23.75 |
| 2026-08-13 00:00 |
03:55:48.67 |
-22:17:43.8 |
HIP 18248 |
23.76 |
| 2026-08-13 12:00 |
03:55:48.91 |
-22:17:56.8 |
HIP 18248 |
23.77 |
| 2026-08-14 00:00 |
03:55:49.14 |
-22:18:09.7 |
HIP 18248 |
23.77 |
| 2026-08-14 12:00 |
03:55:49.35 |
-22:18:22.8 |
HIP 18248 |
23.78 |
| 2026-08-15 00:00 |
03:55:49.55 |
-22:18:35.8 |
HIP 18248 |
23.79 |
| 2026-08-15 12:00 |
03:55:49.74 |
-22:18:49.0 |
HIP 18248 |
23.79 |
| 2026-08-16 00:00 |
03:55:49.92 |
-22:19:02.1 |
HIP 18248 |
23.79 |
| 2026-08-16 12:00 |
03:55:50.08 |
-22:19:15.3 |
HIP 18248 |
23.80 |
| 2026-08-17 00:00 |
03:55:50.24 |
-22:19:28.6 |
HIP 18248 |
23.80 |
| 2026-08-17 12:00 |
03:55:50.38 |
-22:19:41.9 |
HIP 18248 |
23.80 |
| 2026-08-18 00:00 |
03:55:50.51 |
-22:19:55.2 |
HIP 18248 |
23.80 |
| 2026-08-18 12:00 |
03:55:50.63 |
-22:20:08.6 |
HIP 18248 |
23.80 |
| 2026-08-19 00:00 |
03:55:50.73 |
-22:20:22.0 |
HIP 18248 |
23.80 |