메타데이터
| 항목 |
값 |
| Designation |
85D/Boethin |
| Type |
D |
| Perihelion (tp_cal, UTC) |
2008-12-12T17:55:03.103680Z |
| Orbit solution date (soln_date, UTC) |
2007-09-25T13:47:46Z |
| Obs used |
51 |
| NEO |
Yes |
| M1 |
- |
| K1 |
- |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2007-06-01.0000000 |
| e |
0.78116063 |
| q (au) |
1.134657 |
| a (au) |
5.184887 |
| i (deg) |
4.295295 |
| Ω (om, deg) |
359.396114 |
| ω (w, deg) |
37.618385 |
| M (ma, deg) |
313.187511 |
밝기
산란 + 전체 선형
$$
M_a = (8.705 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
8.705 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.865 |
| k |
1.000 |
| δ90 |
9.985 |
| 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 |
14:07:47.61 |
-17:24:26.2 |
HIP 68918 |
17.98 |
| 2026-06-01 12:00 |
14:07:38.32 |
-17:23:30.1 |
HIP 68918 |
16.00 |
| 2026-06-02 00:00 |
14:07:29.12 |
-17:22:34.4 |
HIP 68918 |
14.17 |
| 2026-06-02 12:00 |
14:07:20.00 |
-17:21:38.9 |
HIP 68918 |
12.54 |
| 2026-06-03 00:00 |
14:07:10.97 |
-17:20:43.7 |
HIP 68918 |
11.19 |
| 2026-06-03 12:00 |
14:07:02.02 |
-17:19:48.9 |
HIP 68918 |
10.21 |
| 2026-06-04 00:00 |
14:06:53.16 |
-17:18:54.3 |
HIP 68918 |
9.71 |
| 2026-06-04 12:00 |
14:06:44.38 |
-17:18:00.1 |
HIP 68918 |
9.74 |
| 2026-06-05 00:00 |
14:06:35.70 |
-17:17:06.2 |
HIP 68918 |
10.28 |
| 2026-06-05 12:00 |
14:06:27.10 |
-17:16:12.6 |
HIP 68918 |
11.26 |
| 2026-06-06 00:00 |
14:06:18.59 |
-17:15:19.3 |
HIP 68918 |
12.55 |
| 2026-06-06 12:00 |
14:06:10.17 |
-17:14:26.4 |
HIP 68918 |
14.05 |
| 2026-06-07 00:00 |
14:06:01.84 |
-17:13:33.8 |
HIP 68918 |
15.71 |
| 2026-06-07 12:00 |
14:05:53.60 |
-17:12:41.6 |
HIP 68918 |
17.46 |
| 2026-06-08 00:00 |
14:05:45.46 |
-17:11:49.7 |
HIP 68918 |
19.28 |
| 2026-06-08 12:00 |
14:05:37.40 |
-17:10:58.2 |
HIP 68918 |
21.13 |
| 2026-06-09 00:00 |
14:05:29.44 |
-17:10:07.0 |
HIP 68918 |
23.01 |
| 2026-06-09 12:00 |
14:05:21.58 |
-17:09:16.3 |
HIP 68918 |
24.90 |
| 2026-06-10 00:00 |
14:05:13.81 |
-17:08:25.9 |
HIP 68918 |
26.80 |
| 2026-06-10 12:00 |
14:05:06.13 |
-17:07:35.9 |
HIP 68918 |
28.69 |
| 2026-06-11 00:00 |
14:04:58.55 |
-17:06:46.3 |
HIP 68918 |
30.58 |
| 2026-06-11 12:00 |
14:04:51.07 |
-17:05:57.0 |
HIP 68643 |
30.16 |
| 2026-06-12 00:00 |
14:04:43.69 |
-17:05:08.2 |
HIP 68643 |
29.15 |
| 2026-06-12 12:00 |
14:04:36.40 |
-17:04:19.8 |
HIP 68643 |
28.25 |
| 2026-06-13 00:00 |
14:04:29.21 |
-17:03:31.8 |
HIP 68643 |
27.46 |
| 2026-06-13 12:00 |
14:04:22.12 |
-17:02:44.2 |
HIP 68643 |
26.80 |
| 2026-06-14 00:00 |
14:04:15.13 |
-17:01:57.0 |
HIP 68643 |
26.27 |
| 2026-06-14 12:00 |
14:04:08.25 |
-17:01:10.3 |
HIP 68643 |
25.86 |
| 2026-06-15 00:00 |
14:04:01.46 |
-17:00:24.0 |
HIP 68643 |
25.58 |
| 2026-06-15 12:00 |
14:03:54.77 |
-16:59:38.1 |
HIP 68643 |
25.44 |
| 2026-06-16 00:00 |
14:03:48.19 |
-16:58:52.7 |
HIP 68643 |
25.42 |
| 2026-06-16 12:00 |
14:03:41.71 |
-16:58:07.7 |
HIP 68643 |
25.52 |
| 2026-06-17 00:00 |
14:03:35.33 |
-16:57:23.2 |
HIP 68643 |
25.73 |
| 2026-06-17 12:00 |
14:03:29.06 |
-16:56:39.1 |
HIP 68643 |
26.05 |
| 2026-06-18 00:00 |
14:03:22.89 |
-16:55:55.5 |
HIP 68643 |
26.47 |
| 2026-06-18 12:00 |
14:03:16.83 |
-16:55:12.4 |
HIP 68643 |
26.98 |
| 2026-06-19 00:00 |
14:03:10.87 |
-16:54:29.7 |
HIP 68643 |
27.57 |
| 2026-06-19 12:00 |
14:03:05.01 |
-16:53:47.5 |
HIP 68643 |
28.23 |
| 2026-06-20 00:00 |
14:02:59.26 |
-16:53:05.8 |
HIP 68643 |
28.95 |
| 2026-06-20 12:00 |
14:02:53.62 |
-16:52:24.5 |
HIP 68643 |
29.72 |
| 2026-06-21 00:00 |
14:02:48.09 |
-16:51:43.8 |
HIP 68643 |
30.53 |
| 2026-06-21 12:00 |
14:02:42.65 |
-16:51:03.5 |
HIP 68643 |
31.39 |
| 2026-06-22 00:00 |
14:02:37.33 |
-16:50:23.7 |
HIP 68643 |
32.27 |