메타데이터
| 항목 |
값 |
| Designation |
139P/Vaisala-Oterma |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2008-04-20T10:37:01.891200Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:27:39Z |
| Obs used |
546 |
| NEO |
- |
| M1 |
7.200 |
| K1 |
18.000 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2010-11-16.0000000 |
| e |
0.24752589 |
| q (au) |
3.402921 |
| a (au) |
4.522310 |
| i (deg) |
2.328730 |
| Ω (om, deg) |
242.377585 |
| ω (w, deg) |
165.725397 |
| M (ma, deg) |
96.291288 |
밝기
산란 + 전체 선형
$$
M_a = (7.897 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
7.897 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-1.000 |
| 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) |
| 2026-03-26 00:00 |
22:38:13.18 |
-06:32:32.6 |
HIP 111915 |
29.63 |
| 2026-03-26 12:00 |
22:38:45.56 |
-06:29:14.0 |
HIP 111915 |
21.77 |
| 2026-03-27 00:00 |
22:39:17.90 |
-06:25:55.3 |
HIP 111915 |
14.88 |
| 2026-03-27 12:00 |
22:39:50.20 |
-06:22:36.7 |
HIP 111915 |
10.95 |
| 2026-03-28 00:00 |
22:40:22.45 |
-06:19:18.0 |
HIP 111915 |
13.00 |
| 2026-03-28 12:00 |
22:40:54.67 |
-06:15:59.3 |
HIP 111915 |
19.19 |
| 2026-03-29 00:00 |
22:41:26.84 |
-06:12:40.6 |
HIP 111915 |
26.78 |
| 2026-03-29 12:00 |
22:41:58.97 |
-06:09:21.8 |
HIP 112190 |
25.18 |
| 2026-03-30 00:00 |
22:42:31.06 |
-06:06:03.1 |
HIP 112190 |
21.88 |
| 2026-03-30 12:00 |
22:43:03.10 |
-06:02:44.3 |
HIP 112190 |
21.75 |
| 2026-03-31 00:00 |
22:43:35.10 |
-05:59:25.6 |
HIP 112095 |
24.78 |
| 2026-03-31 12:00 |
22:44:07.06 |
-05:56:06.9 |
HIP 112095 |
29.90 |
| 2026-04-01 00:00 |
22:44:38.97 |
-05:52:48.1 |
HIP 112095 |
36.36 |
| 2026-04-01 12:00 |
22:45:10.83 |
-05:49:29.4 |
HIP 112095 |
43.55 |
| 2026-04-02 00:00 |
22:45:42.65 |
-05:46:10.7 |
HIP 112598 |
38.58 |
| 2026-04-02 12:00 |
22:46:14.43 |
-05:42:52.0 |
HIP 112598 |
30.84 |
| 2026-04-03 00:00 |
22:46:46.16 |
-05:39:33.4 |
HIP 112598 |
23.69 |
| 2026-04-03 12:00 |
22:47:17.84 |
-05:36:14.8 |
HIP 112598 |
17.84 |
| 2026-04-04 00:00 |
22:47:49.47 |
-05:32:56.2 |
HIP 112621 |
11.11 |
| 2026-04-04 12:00 |
22:48:21.06 |
-05:29:37.6 |
HIP 112621 |
6.66 |
| 2026-04-05 00:00 |
22:48:52.60 |
-05:26:19.1 |
HIP 112621 |
10.51 |
| 2026-04-05 12:00 |
22:49:24.09 |
-05:23:00.7 |
HIP 112621 |
17.93 |
| 2026-04-06 00:00 |
22:49:55.53 |
-05:19:42.3 |
HIP 112621 |
26.01 |
| 2026-04-06 12:00 |
22:50:26.92 |
-05:16:23.9 |
HIP 112621 |
34.28 |
| 2026-04-07 00:00 |
22:50:58.27 |
-05:13:05.7 |
HIP 113011 |
33.91 |
| 2026-04-07 12:00 |
22:51:29.56 |
-05:09:47.5 |
HIP 113011 |
27.40 |
| 2026-04-08 00:00 |
22:52:00.80 |
-05:06:29.3 |
HIP 113011 |
22.24 |
| 2026-04-08 12:00 |
22:52:31.99 |
-05:03:11.3 |
HIP 113011 |
19.53 |
| 2026-04-09 00:00 |
22:53:03.12 |
-04:59:53.3 |
HIP 113011 |
20.26 |
| 2026-04-09 12:00 |
22:53:34.21 |
-04:56:35.5 |
HIP 113056 |
17.33 |
| 2026-04-10 00:00 |
22:54:05.24 |
-04:53:17.7 |
HIP 113056 |
14.81 |
| 2026-04-10 12:00 |
22:54:36.21 |
-04:50:00.0 |
HIP 113184 |
12.68 |
| 2026-04-11 00:00 |
22:55:07.13 |
-04:46:42.4 |
HIP 113184 |
12.60 |
| 2026-04-11 12:00 |
22:55:38.00 |
-04:43:25.0 |
HIP 113184 |
17.23 |
| 2026-04-12 00:00 |
22:56:08.81 |
-04:40:07.7 |
HIP 113345 |
19.03 |
| 2026-04-12 12:00 |
22:56:39.57 |
-04:36:50.5 |
HIP 113345 |
15.05 |
| 2026-04-13 00:00 |
22:57:10.26 |
-04:33:33.4 |
HIP 113345 |
15.15 |
| 2026-04-13 12:00 |
22:57:40.90 |
-04:30:16.5 |
HIP 113440 |
12.33 |
| 2026-04-14 00:00 |
22:58:11.48 |
-04:26:59.7 |
HIP 113440 |
5.65 |
| 2026-04-14 12:00 |
22:58:42.01 |
-04:23:43.0 |
HIP 113440 |
7.04 |
| 2026-04-15 00:00 |
22:59:12.47 |
-04:20:26.5 |
HIP 113537 |
7.32 |
| 2026-04-15 12:00 |
22:59:42.87 |
-04:17:10.2 |
HIP 113537 |
4.70 |
| 2026-04-16 00:00 |
23:00:13.21 |
-04:13:54.1 |
HIP 113537 |
11.26 |