메타데이터
| 항목 |
값 |
| Designation |
273P/Pons-Gambart |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2012-12-19T16:06:04.144320Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:28:12Z |
| Obs used |
1140 |
| NEO |
Yes |
| M1 |
11.300 |
| K1 |
8.750 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2013-03-18.0000000 |
| e |
0.97532437 |
| q (au) |
0.810159 |
| a (au) |
32.832346 |
| i (deg) |
136.396031 |
| Ω (om, deg) |
320.431172 |
| ω (w, deg) |
20.191912 |
| M (ma, deg) |
0.462759 |
밝기
산란 + 전체 선형
$$
M_a = (12.697 + 5.779\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
12.697 |
| n |
5.779 |
| gf |
0.989 |
| gb |
-0.949 |
| 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
잔차 (구간 선형)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 시작일 (UTC) |
끝 (UTC) |
a |
b |
| 2012-12-22 |
2013-01-27 |
-8.2343 |
-1.482 |
| 2013-01-27 |
2013-02-11 |
+1.7962 |
-1.599 |
| 2013-02-11 |
2013-03-04 |
+15.9200 |
-2.714 |
| 2013-03-04 |
2013-04-29 |
+2.7105 |
-0.831 |
| 2013-04-29 |
2014-04-04 |
-2.5481 |
+0.557 |
log10 r = log10(태양거리/AU), Δ = 지구거리(AU)
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-07-29 00:00 |
09:09:36.53 |
+12:34:11.4 |
HIP 45107 |
32.84 |
| 2026-07-29 12:00 |
09:09:40.27 |
+12:33:53.2 |
HIP 45107 |
32.29 |
| 2026-07-30 00:00 |
09:09:44.01 |
+12:33:35.0 |
HIP 45107 |
31.75 |
| 2026-07-30 12:00 |
09:09:47.76 |
+12:33:16.7 |
HIP 45107 |
31.24 |
| 2026-07-31 00:00 |
09:09:51.51 |
+12:32:58.4 |
HIP 45107 |
30.75 |
| 2026-07-31 12:00 |
09:09:55.27 |
+12:32:40.0 |
HIP 45107 |
30.29 |
| 2026-08-01 00:00 |
09:09:59.03 |
+12:32:21.6 |
HIP 45107 |
29.84 |
| 2026-08-01 12:00 |
09:10:02.79 |
+12:32:03.1 |
HIP 45107 |
29.42 |
| 2026-08-02 00:00 |
09:10:06.55 |
+12:31:44.6 |
HIP 45107 |
29.03 |
| 2026-08-02 12:00 |
09:10:10.32 |
+12:31:26.0 |
HIP 45107 |
28.67 |
| 2026-08-03 00:00 |
09:10:14.09 |
+12:31:07.4 |
HIP 45107 |
28.33 |
| 2026-08-03 12:00 |
09:10:17.86 |
+12:30:48.8 |
HIP 45107 |
28.03 |
| 2026-08-04 00:00 |
09:10:21.64 |
+12:30:30.0 |
HIP 45107 |
27.75 |
| 2026-08-04 12:00 |
09:10:25.41 |
+12:30:11.3 |
HIP 45107 |
27.51 |
| 2026-08-05 00:00 |
09:10:29.19 |
+12:29:52.5 |
HIP 45107 |
27.30 |
| 2026-08-05 12:00 |
09:10:32.97 |
+12:29:33.6 |
HIP 45107 |
27.13 |
| 2026-08-06 00:00 |
09:10:36.75 |
+12:29:14.7 |
HIP 45107 |
26.99 |
| 2026-08-06 12:00 |
09:10:40.53 |
+12:28:55.8 |
HIP 45107 |
26.88 |
| 2026-08-07 00:00 |
09:10:44.31 |
+12:28:36.8 |
HIP 45107 |
26.81 |
| 2026-08-07 12:00 |
09:10:48.09 |
+12:28:17.8 |
HIP 45107 |
26.77 |
| 2026-08-08 00:00 |
09:10:51.87 |
+12:27:58.8 |
HIP 45107 |
26.78 |
| 2026-08-08 12:00 |
09:10:55.65 |
+12:27:39.7 |
HIP 45107 |
26.81 |
| 2026-08-09 00:00 |
09:10:59.43 |
+12:27:20.6 |
HIP 45107 |
26.89 |
| 2026-08-09 12:00 |
09:11:03.21 |
+12:27:01.4 |
HIP 45107 |
27.00 |
| 2026-08-10 00:00 |
09:11:06.98 |
+12:26:42.3 |
HIP 45107 |
27.14 |
| 2026-08-10 12:00 |
09:11:10.76 |
+12:26:23.0 |
HIP 45107 |
27.32 |
| 2026-08-11 00:00 |
09:11:14.53 |
+12:26:03.8 |
HIP 45216 |
26.80 |
| 2026-08-11 12:00 |
09:11:18.31 |
+12:25:44.5 |
HIP 45216 |
25.83 |
| 2026-08-12 00:00 |
09:11:22.08 |
+12:25:25.2 |
HIP 45216 |
24.86 |
| 2026-08-12 12:00 |
09:11:25.84 |
+12:25:05.9 |
HIP 45216 |
23.89 |
| 2026-08-13 00:00 |
09:11:29.61 |
+12:24:46.5 |
HIP 45216 |
22.92 |
| 2026-08-13 12:00 |
09:11:33.37 |
+12:24:27.2 |
HIP 45216 |
21.96 |
| 2026-08-14 00:00 |
09:11:37.13 |
+12:24:07.8 |
HIP 45216 |
20.99 |
| 2026-08-14 12:00 |
09:11:40.88 |
+12:23:48.3 |
HIP 45216 |
20.02 |
| 2026-08-15 00:00 |
09:11:44.63 |
+12:23:28.9 |
HIP 45216 |
19.06 |
| 2026-08-15 12:00 |
09:11:48.38 |
+12:23:09.4 |
HIP 45216 |
18.10 |
| 2026-08-16 00:00 |
09:11:52.12 |
+12:22:50.0 |
HIP 45216 |
17.14 |
| 2026-08-16 12:00 |
09:11:55.86 |
+12:22:30.5 |
HIP 45216 |
16.18 |
| 2026-08-17 00:00 |
09:11:59.59 |
+12:22:10.9 |
HIP 45216 |
15.22 |
| 2026-08-17 12:00 |
09:12:03.31 |
+12:21:51.4 |
HIP 45216 |
14.26 |
| 2026-08-18 00:00 |
09:12:07.04 |
+12:21:31.9 |
HIP 45216 |
13.31 |
| 2026-08-18 12:00 |
09:12:10.75 |
+12:21:12.3 |
HIP 45216 |
12.36 |
| 2026-08-19 00:00 |
09:12:14.46 |
+12:20:52.8 |
HIP 45216 |
11.42 |