메타데이터
| 항목 |
값 |
| Designation |
289P/Blanpain |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2019-12-20T23:47:39.655680Z |
| Orbit solution date (soln_date, UTC) |
2025-05-23T12:29:45Z |
| Obs used |
356 |
| NEO |
Yes |
| M1 |
22.000 |
| K1 |
4.500 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2019-09-19.0000000 |
| e |
0.68514009 |
| q (au) |
0.958876 |
| a (au) |
3.045405 |
| i (deg) |
5.897388 |
| Ω (om, deg) |
68.924004 |
| ω (w, deg) |
9.849290 |
| M (ma, deg) |
342.754359 |
밝기
산란 + 전체 선형
$$
M_a = (18.699 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
18.699 |
| n |
2.000 |
| gf |
0.999 |
| gb |
-0.504 |
| 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) |
| 2026-06-01 00:00 |
14:30:41.99 |
-11:47:44.5 |
HIP 71005 |
10.00 |
| 2026-06-01 12:00 |
14:30:22.50 |
-11:46:46.0 |
HIP 71005 |
14.76 |
| 2026-06-02 00:00 |
14:30:03.26 |
-11:45:48.6 |
HIP 71005 |
19.51 |
| 2026-06-02 12:00 |
14:29:44.27 |
-11:44:52.4 |
HIP 71005 |
24.21 |
| 2026-06-03 00:00 |
14:29:25.53 |
-11:43:57.4 |
HIP 71005 |
28.87 |
| 2026-06-03 12:00 |
14:29:07.05 |
-11:43:03.6 |
HIP 70720 |
30.46 |
| 2026-06-04 00:00 |
14:28:48.81 |
-11:42:11.0 |
HIP 70720 |
27.08 |
| 2026-06-04 12:00 |
14:28:30.83 |
-11:41:19.6 |
HIP 70720 |
24.13 |
| 2026-06-05 00:00 |
14:28:13.11 |
-11:40:29.5 |
HIP 70720 |
21.76 |
| 2026-06-05 12:00 |
14:27:55.65 |
-11:39:40.5 |
HIP 70720 |
20.12 |
| 2026-06-06 00:00 |
14:27:38.44 |
-11:38:52.8 |
HIP 70720 |
19.35 |
| 2026-06-06 12:00 |
14:27:21.50 |
-11:38:06.4 |
HIP 70720 |
19.51 |
| 2026-06-07 00:00 |
14:27:04.81 |
-11:37:21.1 |
HIP 70720 |
20.55 |
| 2026-06-07 12:00 |
14:26:48.39 |
-11:36:37.2 |
HIP 70720 |
22.30 |
| 2026-06-08 00:00 |
14:26:32.23 |
-11:35:54.5 |
HIP 70720 |
24.57 |
| 2026-06-08 12:00 |
14:26:16.34 |
-11:35:13.0 |
HIP 70452 |
23.89 |
| 2026-06-09 00:00 |
14:26:00.71 |
-11:34:32.8 |
HIP 70452 |
20.34 |
| 2026-06-09 12:00 |
14:25:45.34 |
-11:33:53.9 |
HIP 70452 |
16.99 |
| 2026-06-10 00:00 |
14:25:30.25 |
-11:33:16.3 |
HIP 70452 |
13.92 |
| 2026-06-10 12:00 |
14:25:15.42 |
-11:32:39.9 |
HIP 70452 |
11.31 |
| 2026-06-11 00:00 |
14:25:00.86 |
-11:32:04.9 |
HIP 70452 |
9.46 |
| 2026-06-11 12:00 |
14:24:46.58 |
-11:31:31.1 |
HIP 70452 |
8.77 |
| 2026-06-12 00:00 |
14:24:32.56 |
-11:30:58.6 |
HIP 70452 |
9.43 |
| 2026-06-12 12:00 |
14:24:18.81 |
-11:30:27.4 |
HIP 70452 |
11.12 |
| 2026-06-13 00:00 |
14:24:05.34 |
-11:29:57.6 |
HIP 70452 |
13.43 |
| 2026-06-13 12:00 |
14:23:52.14 |
-11:29:29.0 |
HIP 70336 |
14.85 |
| 2026-06-14 00:00 |
14:23:39.21 |
-11:29:01.7 |
HIP 70336 |
14.20 |
| 2026-06-14 12:00 |
14:23:26.55 |
-11:28:35.8 |
HIP 70336 |
14.24 |
| 2026-06-15 00:00 |
14:23:14.17 |
-11:28:11.1 |
HIP 70336 |
14.91 |
| 2026-06-15 12:00 |
14:23:02.07 |
-11:27:47.8 |
HIP 70336 |
16.11 |
| 2026-06-16 00:00 |
14:22:50.24 |
-11:27:25.8 |
HIP 70336 |
17.68 |
| 2026-06-16 12:00 |
14:22:38.68 |
-11:27:05.1 |
HIP 70336 |
19.50 |
| 2026-06-17 00:00 |
14:22:27.40 |
-11:26:45.7 |
HIP 70153 |
17.69 |
| 2026-06-17 12:00 |
14:22:16.40 |
-11:26:27.6 |
HIP 70153 |
14.98 |
| 2026-06-18 00:00 |
14:22:05.67 |
-11:26:10.8 |
HIP 70153 |
12.35 |
| 2026-06-18 12:00 |
14:21:55.22 |
-11:25:55.4 |
HIP 70153 |
9.78 |
| 2026-06-19 00:00 |
14:21:45.04 |
-11:25:41.2 |
HIP 70153 |
7.30 |
| 2026-06-19 12:00 |
14:21:35.14 |
-11:25:28.4 |
HIP 70153 |
4.91 |
| 2026-06-20 00:00 |
14:21:25.51 |
-11:25:16.8 |
HIP 70153 |
2.67 |
| 2026-06-20 12:00 |
14:21:16.15 |
-11:25:06.6 |
HIP 70153 |
1.20 |
| 2026-06-21 00:00 |
14:21:07.07 |
-11:24:57.7 |
HIP 70153 |
2.46 |
| 2026-06-21 12:00 |
14:20:58.26 |
-11:24:50.0 |
HIP 70153 |
4.48 |
| 2026-06-22 00:00 |
14:20:49.73 |
-11:24:43.7 |
HIP 70153 |
6.53 |